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href="#British_coal...best_in_the_world..."> <div class="vector-toc-text"> <span class="vector-toc-numb">4</span> <span>British coal...best in the world...</span> </div> </a> <span class="ext-discussiontools-init-sidebar-meta">2 comments</span> <ul id="toc-British_coal...best_in_the_world...-sublist" class="vector-toc-list"> </ul> </li> <li id="toc-Coal_as_a_traded_commodity" class="vector-toc-list-item vector-toc-level-1 vector-toc-list-item-expanded"> <a class="vector-toc-link" href="#Coal_as_a_traded_commodity"> <div class="vector-toc-text"> <span class="vector-toc-numb">5</span> <span>Coal as a traded commodity</span> </div> </a> <span class="ext-discussiontools-init-sidebar-meta">1 comment</span> <ul id="toc-Coal_as_a_traded_commodity-sublist" class="vector-toc-list"> </ul> </li> </ul> </div> </div> </nav> </div> </div> <div class="mw-content-container"> <main id="content" class="mw-body"> <header class="mw-body-header vector-page-titlebar"> <nav aria-label="Contents" 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href='/w/index.php?title=Talk:Coal&diff=prev&oldid=322663079&diff-type=inline'><span class='oo-ui-toggleSwitchWidget-grip'></span></a></div></div></div></div></div></div><table class="diff diff-type-table diff-contentalign-left diff-editfont-monospace" data-mw="interface"> <col class="diff-marker" /> <col class="diff-content" /> <col class="diff-marker" /> <col class="diff-content" /> <tr class="diff-title" lang="en"> <td colspan="2" class="diff-otitle diff-side-deleted"><div id="mw-diff-otitle1"><strong><a href="/w/index.php?title=Talk:Coal&oldid=322662609" title="Talk:Coal">Revision as of 02:25, 29 October 2009</a> <span class="mw-diff-edit"><a href="/w/index.php?title=Talk:Coal&action=edit&oldid=322662609" title="Talk:Coal">edit</a></span><span class="mw-diff-timestamp" data-timestamp="2009-10-29T02:25:35Z"></span></strong></div><div id="mw-diff-otitle2"><a href="/wiki/User:TharsHammar" class="mw-userlink" title="User:TharsHammar" data-mw-revid="322662609"><bdi>TharsHammar</bdi></a> <span class="mw-usertoollinks">(<a href="/wiki/User_talk:TharsHammar" class="mw-usertoollinks-talk" title="User talk:TharsHammar">talk</a> | <a href="/wiki/Special:Contributions/TharsHammar" class="mw-usertoollinks-contribs" title="Special:Contributions/TharsHammar">contribs</a>)</span><div class="mw-diff-usermetadata"><div class="mw-diff-userroles"></div><div class="mw-diff-usereditcount"><span>1,678</span> edits</div></div></div><div id="mw-diff-otitle3"> <span class="comment comment--without-parentheses"><span class="autocomment"><a href="#British_coal...best_in_the_world...">→<bdi dir="ltr">British coal...best in the world...</bdi></a></span></span></div><div id="mw-diff-otitle5"></div><div id="mw-diff-otitle4"><a href="/w/index.php?title=Talk:Coal&diff=prev&oldid=322662609" title="Talk:Coal" id="differences-prevlink">← Previous edit</a></div></td> <td colspan="2" class="diff-ntitle diff-side-added"><div id="mw-diff-ntitle1"><strong><a href="/w/index.php?title=Talk:Coal&oldid=322663079" title="Talk:Coal">Revision as of 02:28, 29 October 2009</a> <span class="mw-diff-edit"><a href="/w/index.php?title=Talk:Coal&action=edit&oldid=322663079" title="Talk:Coal">edit</a></span><span class="mw-diff-timestamp" data-timestamp="2009-10-29T02:28:54Z"></span> <span class="mw-diff-undo"><a href="/w/index.php?title=Talk:Coal&action=edit&undoafter=322662609&undo=322663079" title=""Undo" reverts this edit and opens the edit form in preview mode. It allows adding a reason in the summary.">undo</a></span></strong></div><div id="mw-diff-ntitle2"><a href="/wiki/User:TharsHammar" class="mw-userlink" title="User:TharsHammar" data-mw-revid="322663079"><bdi>TharsHammar</bdi></a> <span class="mw-usertoollinks">(<a href="/wiki/User_talk:TharsHammar" class="mw-usertoollinks-talk" title="User talk:TharsHammar">talk</a> | <a href="/wiki/Special:Contributions/TharsHammar" class="mw-usertoollinks-contribs" title="Special:Contributions/TharsHammar">contribs</a>)</span><div class="mw-diff-usermetadata"><div class="mw-diff-userroles"></div><div class="mw-diff-usereditcount"><span>1,678</span> edits</div></div></div><div id="mw-diff-ntitle3"> <span class="comment comment--without-parentheses"><span class="autocomment"><a href="#waste_products_or_resourses?">→<bdi dir="ltr">waste products or resourses?</bdi></a></span></span></div><div id="mw-diff-ntitle5"></div><div id="mw-diff-ntitle4"><a href="/w/index.php?title=Talk:Coal&diff=next&oldid=322663079" title="Talk:Coal" id="differences-nextlink">Next edit →</a></div></td> </tr><tr> <td colspan="2" class="diff-lineno">Line 46:</td> <td colspan="2" class="diff-lineno">Line 46:</td> </tr> <tr> <td class="diff-marker"></td> <td class="diff-context diff-side-deleted"><br /></td> <td class="diff-marker"></td> <td class="diff-context diff-side-added"><br /></td> </tr> <tr> <td class="diff-marker"></td> <td class="diff-context diff-side-deleted"><div>Some of the waste products of coal combustion are listed as mercury, uranium, thorium, arsenic and other heavy metals. Surely these are valuable by-products rather than waste-products (assuming they can be successfully extracted). Or am I being hopelessly niave...? <span style="font-size: smaller;" class="autosigned">—Preceding [[Wikipedia:Signatures|unsigned]] comment added by [[Special:Contributions/82.5.68.95|82.5.68.95]] ([[User talk:82.5.68.95|talk]]) 03:40, 8 August 2009 (UTC)</span> </div></td> <td class="diff-marker"></td> <td class="diff-context diff-side-added"><div>Some of the waste products of coal combustion are listed as mercury, uranium, thorium, arsenic and other heavy metals. Surely these are valuable by-products rather than waste-products (assuming they can be successfully extracted). Or am I being hopelessly niave...? <span style="font-size: smaller;" class="autosigned">—Preceding [[Wikipedia:Signatures|unsigned]] comment added by [[Special:Contributions/82.5.68.95|82.5.68.95]] ([[User talk:82.5.68.95|talk]]) 03:40, 8 August 2009 (UTC)</span> </div></td> </tr> <tr> <td colspan="2" class="diff-empty diff-side-deleted"></td> <td class="diff-marker" data-marker="+"></td> <td class="diff-addedline diff-side-added"><div>:Yes, you are being hopelessly niave :). The mercury is on the parts per billion levels but when you burn millions of tons of coal it adds up to a problem. Coal is mined from coal mines because thats where there is a high concentration of coal. Mercury is mined from mercury mines because that is where there is a high concentration of mercury, same goes for uranium, thorium, etc, etc. It needs to be a concentrated stream of a metal to be valuable (ofcourse concentrated varys with how difficult it is to seperate the choice metal and the metal price!) [[User:TharsHammar|TharsHammar]]<sup>'' [[Special:Contributions/TharsHammar|Bits]]''</sup> and<sup>''[[User_talk:TharsHammar#top|Pieces]]''</sup> 02:28, 29 October 2009 (UTC)</div></td> </tr> <tr> <td class="diff-marker"></td> <td class="diff-context diff-side-deleted"><br /></td> <td class="diff-marker"></td> <td class="diff-context diff-side-added"><br /></td> </tr> <tr> <td class="diff-marker"></td> <td class="diff-context diff-side-deleted"><div>== British coal...best in the world... ==</div></td> <td class="diff-marker"></td> <td class="diff-context diff-side-added"><div>== British coal...best in the world... ==</div></td> </tr> </table><hr class='diff-hr' id='mw-oldid' /> <h2 class='diff-currentversion-title'>Revision as of 02:28, 29 October 2009</h2> <div class="mw-content-ltr mw-parser-output" lang="en" dir="ltr"><style data-mw-deduplicate="TemplateStyles:r1237879475">.mw-parser-output .tmbox{margin:4px 0;border-collapse:collapse;border:1px solid #c0c090;background-color:#f8eaba;box-sizing:border-box}.mw-parser-output .tmbox.mbox-small{font-size:88%;line-height:1.25em}.mw-parser-output .tmbox-speedy{border:2px solid #b32424;background-color:#fee7e6}.mw-parser-output .tmbox-delete{border:2px solid #b32424}.mw-parser-output .tmbox-content{border:2px solid #f28500}.mw-parser-output .tmbox-style{border:2px solid #fc3}.mw-parser-output .tmbox-move{border:2px solid #9932cc}.mw-parser-output .tmbox .mbox-text{border:none;padding:0.25em 0.9em;width:100%}.mw-parser-output .tmbox .mbox-image{border:none;padding:2px 0 2px 0.9em;text-align:center}.mw-parser-output .tmbox .mbox-imageright{border:none;padding:2px 0.9em 2px 0;text-align:center}.mw-parser-output .tmbox .mbox-empty-cell{border:none;padding:0;width:1px}.mw-parser-output .tmbox .mbox-invalid-type{text-align:center}@media(min-width:720px){.mw-parser-output .tmbox{margin:4px 10%}.mw-parser-output .tmbox.mbox-small{clear:right;float:right;margin:4px 0 4px 1em;width:238px}}@media screen{html.skin-theme-clientpref-night .mw-parser-output .tmbox{background-color:#2e2505}html.skin-theme-clientpref-night .mw-parser-output .tmbox-speedy{background-color:#310402}}@media screen and (prefers-color-scheme:dark){html.skin-theme-clientpref-os .mw-parser-output .tmbox{background-color:#2e2505}html.skin-theme-clientpref-os .mw-parser-output .tmbox-speedy{background-color:#310402}}body.skin--responsive .mw-parser-output table.tmbox img{max-width:none!important}</style><style data-mw-deduplicate="TemplateStyles:r1135653291">@media(min-width:720px){.mw-parser-output .article-history{min-width:80%}}</style><table class="article-history tmbox tmbox-notice"><tbody><tr><td class="mbox-image"><span typeof="mw:File"><a href="/wiki/File:Cscr-former.svg" class="mw-file-description" title="Former featured article candidate"><img alt="Former featured article candidate" src="//upload.wikimedia.org/wikipedia/commons/thumb/9/9e/Cscr-former.svg/50px-Cscr-former.svg.png" decoding="async" width="50" height="47" class="mw-file-element" srcset="//upload.wikimedia.org/wikipedia/commons/thumb/9/9e/Cscr-former.svg/75px-Cscr-former.svg.png 1.5x, //upload.wikimedia.org/wikipedia/commons/thumb/9/9e/Cscr-former.svg/100px-Cscr-former.svg.png 2x" data-file-width="462" data-file-height="438"/></a></span></td><td class="mbox-text"><b>Coal</b> is a former <a href="/wiki/Wikipedia:Featured_article_candidates" title="Wikipedia:Featured article candidates">featured article candidate</a>. 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See <a href="/wiki/Wikipedia:PIQA" class="mw-redirect" title="Wikipedia:PIQA">WP:PIQA</a> for details.</div><link rel="mw-deduplicated-inline-style" href="mw-data:TemplateStyles:r1237879475"><link rel="mw-deduplicated-inline-style" href="mw-data:TemplateStyles:r1256394742"><table class="tmbox tmbox-notice mw-collapsible innercollapse wpb wpb-table"><tbody><tr class="wpb-header"><td class="wpb-header-icon"><span typeof="mw:File"><a href="/wiki/File:Oil_well_icon.svg" class="mw-file-description"><img alt="WikiProject icon" src="//upload.wikimedia.org/wikipedia/commons/thumb/d/dc/Oil_well_icon.svg/27px-Oil_well_icon.svg.png" decoding="async" width="27" height="25" class="mw-file-element" srcset="//upload.wikimedia.org/wikipedia/commons/thumb/d/dc/Oil_well_icon.svg/42px-Oil_well_icon.svg.png 1.5x, //upload.wikimedia.org/wikipedia/commons/thumb/d/dc/Oil_well_icon.svg/55px-Oil_well_icon.svg.png 2x" data-file-width="136" data-file-height="124"/></a></span></td><td class="wpb-header-combined"><a href="/wiki/Wikipedia:WikiProject_Energy" title="Wikipedia:WikiProject Energy">Energy</a> <span class="wpb-header-bubbles class-b">B‑class</span> <span class="wpb-header-bubbles import-top">Top‑importance</span></td></tr><tr><td class="mbox-text wpb-main" colspan="2"><table><tbody><tr><td class="mbox-image wpb-image"><span typeof="mw:File"><a href="/wiki/File:Oil_well_icon.svg" class="mw-file-description"><img alt="WikiProject icon" src="//upload.wikimedia.org/wikipedia/commons/thumb/d/dc/Oil_well_icon.svg/80px-Oil_well_icon.svg.png" decoding="async" width="80" height="73" class="mw-file-element" srcset="//upload.wikimedia.org/wikipedia/commons/thumb/d/dc/Oil_well_icon.svg/120px-Oil_well_icon.svg.png 1.5x, //upload.wikimedia.org/wikipedia/commons/thumb/d/dc/Oil_well_icon.svg/160px-Oil_well_icon.svg.png 2x" data-file-width="136" data-file-height="124"/></a></span></td><td class="mbox-text"><link rel="mw-deduplicated-inline-style" href="mw-data:TemplateStyles:r1239009302"><ul role="navigation" aria-label="Portals" class="noprint portalbox portalborder portalright"> <li class="portalbox-entry"><span class="portalbox-image"><span class="noviewer" typeof="mw:File"><a href="/wiki/File:Crystal_energy.svg" class="mw-file-description"><img alt="icon" src="//upload.wikimedia.org/wikipedia/commons/thumb/1/14/Crystal_energy.svg/29px-Crystal_energy.svg.png" decoding="async" width="29" height="28" class="mw-file-element" srcset="//upload.wikimedia.org/wikipedia/commons/thumb/1/14/Crystal_energy.svg/44px-Crystal_energy.svg.png 1.5x, //upload.wikimedia.org/wikipedia/commons/thumb/1/14/Crystal_energy.svg/59px-Crystal_energy.svg.png 2x" data-file-width="130" data-file-height="124"/></a></span></span><span class="portalbox-link"><a href="/wiki/Portal:Energy" title="Portal:Energy">Energy portal</a></span></li></ul>This article is within the scope of <b><a href="/wiki/Wikipedia:WikiProject_Energy" title="Wikipedia:WikiProject Energy">WikiProject Energy</a></b>, a collaborative effort to improve the coverage of <a href="/wiki/Energy" title="Energy">Energy</a> on Wikipedia. If you would like to participate, please visit the project page, where you can join <a href="/wiki/Wikipedia_talk:WikiProject_Energy" title="Wikipedia talk:WikiProject Energy">the discussion</a> and see a list of open tasks.<span class="metadata wpb-metadata"><span class="wpb-project">Energy</span><span class="wpb-project_link">Wikipedia:WikiProject Energy</span><span class="wpb-banner_name">Template:WikiProject Energy</span><span class="wpb-assessment_cat">energy articles</span></span></td><td class="mbox-empty-cell"></td></tr><tr><td class="assess class-b"><a href="/wiki/Category:B-Class_energy_articles" title="Category:B-Class energy articles">B</a></td><td class="mbox-text" colspan="2">This article has been rated as <b>B-class</b> on Wikipedia's <a href="/wiki/Wikipedia:Content_assessment" title="Wikipedia:Content assessment">content assessment</a> scale.</td></tr><tr><td class="assess import-top"><a href="/wiki/Category:Top-importance_energy_articles" title="Category:Top-importance energy articles">Top</a></td><td class="mbox-text" colspan="2">This article has been rated as <b>Top-importance</b> on the <a href="/wiki/Wikipedia:WikiProject_Energy/Assessment#Importance_scale" title="Wikipedia:WikiProject Energy/Assessment">project's importance scale</a>.</td></tr></tbody></table></td></tr></tbody></table> <div class="error">Please add the quality rating to the <code>{{WikiProject banner shell}}</code> template instead of this project banner. See <a href="/wiki/Wikipedia:PIQA" class="mw-redirect" title="Wikipedia:PIQA">WP:PIQA</a> for details.</div><link rel="mw-deduplicated-inline-style" href="mw-data:TemplateStyles:r1237879475"><link rel="mw-deduplicated-inline-style" href="mw-data:TemplateStyles:r1256394742"><table class="tmbox tmbox-notice mw-collapsible innercollapse wpb wpb-table"><tbody><tr class="wpb-header"><td class="wpb-header-icon"><span typeof="mw:File"><a href="/wiki/File:The_Earth_seen_from_Apollo_17.jpg" class="mw-file-description"><img alt="WikiProject icon" src="//upload.wikimedia.org/wikipedia/commons/thumb/9/97/The_Earth_seen_from_Apollo_17.jpg/25px-The_Earth_seen_from_Apollo_17.jpg" decoding="async" width="25" height="25" class="mw-file-element" srcset="//upload.wikimedia.org/wikipedia/commons/thumb/9/97/The_Earth_seen_from_Apollo_17.jpg/38px-The_Earth_seen_from_Apollo_17.jpg 1.5x, //upload.wikimedia.org/wikipedia/commons/thumb/9/97/The_Earth_seen_from_Apollo_17.jpg/50px-The_Earth_seen_from_Apollo_17.jpg 2x" data-file-width="3000" data-file-height="3002"/></a></span></td><td class="wpb-header-combined"><a href="/wiki/Wikipedia:WikiProject_Environment" title="Wikipedia:WikiProject Environment">Environment</a> <span class="wpb-header-bubbles class-b">B‑class</span> <span class="wpb-header-bubbles import-high">High‑importance</span></td></tr><tr><td class="mbox-text wpb-main" colspan="2"><table><tbody><tr><td class="mbox-image wpb-image"><span typeof="mw:File"><a href="/wiki/File:The_Earth_seen_from_Apollo_17.jpg" class="mw-file-description"><img alt="WikiProject icon" src="//upload.wikimedia.org/wikipedia/commons/thumb/9/97/The_Earth_seen_from_Apollo_17.jpg/60px-The_Earth_seen_from_Apollo_17.jpg" decoding="async" width="60" height="60" class="mw-file-element" srcset="//upload.wikimedia.org/wikipedia/commons/thumb/9/97/The_Earth_seen_from_Apollo_17.jpg/90px-The_Earth_seen_from_Apollo_17.jpg 1.5x, //upload.wikimedia.org/wikipedia/commons/thumb/9/97/The_Earth_seen_from_Apollo_17.jpg/120px-The_Earth_seen_from_Apollo_17.jpg 2x" data-file-width="3000" data-file-height="3002"/></a></span></td><td class="mbox-text"><link rel="mw-deduplicated-inline-style" href="mw-data:TemplateStyles:r1239009302"><ul role="navigation" aria-label="Portals" class="noprint portalbox portalborder portalright"> <li class="portalbox-entry"><span class="portalbox-image"><span class="noviewer" typeof="mw:File"><a href="/wiki/File:Aegopodium_podagraria1_ies.jpg" class="mw-file-description"><img alt="icon" src="//upload.wikimedia.org/wikipedia/commons/thumb/b/bf/Aegopodium_podagraria1_ies.jpg/32px-Aegopodium_podagraria1_ies.jpg" decoding="async" width="32" height="28" class="mw-file-element" srcset="//upload.wikimedia.org/wikipedia/commons/thumb/b/bf/Aegopodium_podagraria1_ies.jpg/48px-Aegopodium_podagraria1_ies.jpg 1.5x, //upload.wikimedia.org/wikipedia/commons/thumb/b/bf/Aegopodium_podagraria1_ies.jpg/64px-Aegopodium_podagraria1_ies.jpg 2x" data-file-width="800" data-file-height="700"/></a></span></span><span class="portalbox-link"><a href="/wiki/Portal:Environment" title="Portal:Environment">Environment portal</a></span></li></ul>This <a href="/wiki/Category:Natural_environment" title="Category:Natural environment">environment-related</a> article is part of the <b><a href="/wiki/Wikipedia:WikiProject_Environment" title="Wikipedia:WikiProject Environment">WikiProject Environment</a></b> to improve Wikipedia's coverage of the <a href="/wiki/Natural_environment" title="Natural environment">environment</a>. The aim is to write <a href="/wiki/Wikipedia:Neutral_point_of_view" title="Wikipedia:Neutral point of view">neutral</a> and <a href="/wiki/Wikipedia:Cite_sources" class="mw-redirect" title="Wikipedia:Cite sources">well-referenced</a> articles on environment-related topics, as well as to ensure that environment articles are properly <a href="/wiki/Wikipedia:Categories" class="mw-redirect" title="Wikipedia:Categories">categorized</a>.<br/> Read <a href="/wiki/Wikipedia:Contributing_FAQ" class="mw-redirect" title="Wikipedia:Contributing FAQ">Wikipedia:Contributing FAQ</a> and leave any messages at the <a href="/wiki/Wikipedia_talk:WikiProject_Environment" title="Wikipedia talk:WikiProject Environment">project talk page</a>.<span class="metadata wpb-metadata"><span class="wpb-project">Environment</span><span class="wpb-project_link">Wikipedia:WikiProject Environment</span><span class="wpb-banner_name">Template:WikiProject Environment</span><span class="wpb-assessment_cat">Environment articles</span></span></td><td class="mbox-empty-cell"></td></tr><tr><td class="assess class-b"><a href="/wiki/Category:B-Class_Environment_articles" title="Category:B-Class Environment articles">B</a></td><td class="mbox-text" colspan="2">This article has been rated as <b>B-class</b> on Wikipedia's <a href="/wiki/Wikipedia:Content_assessment" title="Wikipedia:Content assessment">content assessment</a> scale.</td></tr><tr><td class="assess import-high"><a href="/wiki/Category:High-importance_Environment_articles" title="Category:High-importance Environment articles">High</a></td><td class="mbox-text" colspan="2">This article has been rated as <b>High-importance</b> on the <a href="/wiki/Wikipedia:WikiProject_Environment/Assessment#Importance_scale" title="Wikipedia:WikiProject Environment/Assessment">project's importance scale</a>.</td></tr></tbody></table></td></tr></tbody></table></td></tr></tbody></table> <p><a href="/w/index.php?title=Template:Energy_portal_fact&action=edit&redlink=1" class="new" title="Template:Energy portal fact (page does not exist)">Template:Energy portal fact</a> <link rel="mw-deduplicated-inline-style" href="mw-data:TemplateStyles:r1237879475"> </p> <table id="archivebox" role="presentation" class="tmbox tmbox-notice mbox-small" style="text-align: center; padding: 1em;"> <tbody><tr> <td style="padding:0.6em 0 0.25em;"> <div style="width:100%; overflow:hidden;"><span typeof="mw:File"><a href="/wiki/File:Replacement_filing_cabinet.svg" class="mw-file-description"><img src="//upload.wikimedia.org/wikipedia/en/thumb/2/2a/Replacement_filing_cabinet.svg/40px-Replacement_filing_cabinet.svg.png" decoding="async" width="40" height="40" class="mw-file-element" srcset="//upload.wikimedia.org/wikipedia/en/thumb/2/2a/Replacement_filing_cabinet.svg/60px-Replacement_filing_cabinet.svg.png 1.5x, //upload.wikimedia.org/wikipedia/en/thumb/2/2a/Replacement_filing_cabinet.svg/80px-Replacement_filing_cabinet.svg.png 2x" data-file-width="200" data-file-height="200"/></a></span><br/><b>Archives</b></div> </td></tr><tr> <td class="plainlinks"> <table style="width: 100%; padding: 0px; text-align: center; background-color: transparent;"><tbody><tr><td><a href="/wiki/Talk:Coal/Archive_1" title="Talk:Coal/Archive 1">Archive 1</a></td><td><a href="/wiki/Talk:Coal/Archive_2" title="Talk:Coal/Archive 2">Archive 2</a></td><td><a href="/wiki/Talk:Coal/Archive_3" title="Talk:Coal/Archive 3">Archive 3</a></td></tr></tbody></table> </td> </tr><tr><td style="padding-bottom:11px"><div class="mw-inputbox-centered" style=""><form name="searchbox" class="searchbox mw-inputbox-form" action="/wiki/Special:Search"><div class="cdx-text-input"><input class="mw-inputbox-input mw-searchInput searchboxInput cdx-text-input__input" name="search" placeholder="" size="22" dir="ltr"/></div><input type="hidden" value="Talk:Coal/" name="prefix"/><br/><input type="submit" name="fulltext" value="Search archives" class="cdx-button"/><input type="hidden" value="Search" name="fulltext"/></form></div> </td></tr><tr><td style="padding:0px 10px; font-size:11.9px;"> <hr/> This page has archives. Sections older than <b>90 days</b> may be automatically archived by <span class="nowraplinks"><a href="/wiki/User:Lowercase_sigmabot_III" title="User:Lowercase sigmabot III">Lowercase sigmabot III</a></span>.</td></tr> </tbody></table> <link rel="mw-deduplicated-inline-style" href="mw-data:TemplateStyles:r1237879475"><style data-mw-deduplicate="TemplateStyles:r1230750088">.mw-parser-output .talkheader{text-align:center}.mw-parser-output .talkheader-body{display:flex}.mw-parser-output .talkheader-help,.mw-parser-output .talkheader-policies,.mw-parser-output .talkheader-shortcuts{display:flex;align-items:center;padding:0.1em}.mw-parser-output .talkheader-help{flex:2 1 auto;border:1px solid #c0c090;background-color:var(--background-color-base,#ffffff);color:inherit}.mw-parser-output .talkheader-policies{flex:1 1 auto}.mw-parser-output .talkheader-policies+.talkheader-policies{border-left:1px solid #c0c090}.mw-parser-output .talkheader-shortcuts{flex:0 1 auto}.mw-parser-output .talkheader-help>*,.mw-parser-output .talkheader-policies>*,.mw-parser-output .talkheader-shortcuts>*{flex:1 1 auto}.mw-parser-output .talkheader-help ul,.mw-parser-output .talkheader-policies ul{margin:0.1em 0.8em 0 1.6em;text-align:left}@media(min-width:720px){.mw-parser-output .talkheader{min-width:80%}}</style><table role="presentation" class="tmbox tmbox-notice talkheader plainlinks" id="talkheader" style="border-collapse: separate;"><tbody><tr> <td style="border-bottom: 1px solid #c0c090; font-weight: bold;">This is the <a href="/wiki/Wikipedia:Talk_page_guidelines" title="Wikipedia:Talk page guidelines">talk page</a> for discussing improvements to the <a href="/wiki/Coal" title="Coal">Coal</a> article.<br/> This is <a href="/wiki/Wikipedia:What_Wikipedia_is_not#FORUM" title="Wikipedia:What Wikipedia is not">not a forum</a> for general discussion of the article's subject.</td> </tr> <tr> <td> <div class="talkheader-body"> <div class="talkheader-help"> <ul><li>Put new text under old text. <strong><a href="/wiki/Special:NewSection/Talk:Coal" title="Special:NewSection/Talk:Coal">Click here to start a new topic.</a></strong></li> <li>New to Wikipedia? Welcome! <a href="/wiki/Help:Introduction" title="Help:Introduction">Learn to edit</a>; <a href="/wiki/Wikipedia:Questions" title="Wikipedia:Questions">get help</a>.</li></ul> </div> <div class="talkheader-policies"> <ul><li><a href="/wiki/Wikipedia:Assume_good_faith" title="Wikipedia:Assume good faith">Assume good faith</a></li> <li><a href="/wiki/Wikipedia:Civility" title="Wikipedia:Civility">Be polite</a> and <a href="/wiki/Wikipedia:No_personal_attacks" title="Wikipedia:No personal attacks">avoid personal attacks</a></li> <li><a href="/wiki/Wikipedia:Please_do_not_bite_the_newcomers" title="Wikipedia:Please do not bite the newcomers">Be welcoming to newcomers</a></li> <li>Seek <a href="/wiki/Wikipedia:Dispute_resolution_requests" title="Wikipedia:Dispute resolution requests">dispute resolution</a> if needed</li></ul> </div><div class="talkheader-policies"> <div><b>Article policies</b> <ul><li><a href="/wiki/Wikipedia:Neutral_point_of_view" title="Wikipedia:Neutral point of view">Neutral point of view</a></li> <li><a href="/wiki/Wikipedia:No_original_research" title="Wikipedia:No original research">No original research</a></li> <li><a href="/wiki/Wikipedia:Verifiability" title="Wikipedia:Verifiability">Verifiability</a></li></ul> </div> </div> </div> </td> </tr><tr><td style="border-top: 1px solid #c0c090; padding: 1px 3px;"><span class="plainlinks"><i>Find sources:</i> <a rel="nofollow" class="external text" href="https://www.google.com/search?as_eq=wikipedia&q=%22Coal%22">Google</a> (<a rel="nofollow" class="external text" href="https://www.google.com/search?tbs=bks:1&q=%22Coal%22+-wikipedia">books</a> <b>·</b> <a rel="nofollow" class="external text" href="https://www.google.com/search?tbm=nws&q=%22Coal%22+-wikipedia&tbs=ar:1">news</a> <b>·</b> <a rel="nofollow" class="external text" href="https://scholar.google.com/scholar?q=%22Coal%22">scholar</a> <b>·</b> <a rel="nofollow" class="external text" href="https://www.google.com/search?safe=off&tbs=sur:fmc&tbm=isch&q=%22Coal%22+-site:wikipedia.org+-site:wikimedia.org">free images</a> <b>·</b> <a rel="nofollow" class="external text" href="https://www.google.com/custom?hl=en&cx=007734830908295939403%3Agalkqgoksq0&cof=FORID%3A13%3BAH%3Aleft%3BCX%3AWikipedia%2520Reference%2520Search&q=%22Coal%22">WP refs</a>) <b>·</b> <span title="Free English newspaper sources" style="border-bottom: 1px dotted;"><a class="external text" href="https://en.wikipedia.org/wiki/Wikipedia:Free_English_newspaper_sources">FENS</a></span> <b>·</b> <a rel="nofollow" class="external text" href="https://www.jstor.org/action/doBasicSearch?Query=%22Coal%22&acc=on&wc=on">JSTOR</a> <b>·</b> <span title="The Wikipedia Library" style="border-bottom: 1px dotted;"><a rel="nofollow" class="external text" href="https://wikipedialibrary.wmflabs.org/search/?q=%22Coal%22">TWL</a></span></span></td></tr><tr><td style="border-top: 1px solid #c0c090; padding: 1px 3px;"><b><a href="/wiki/Help:Archiving_a_talk_page" title="Help:Archiving a talk page">Archives</a>:</b> <a href="/wiki/Talk:Coal/Archive_1" title="Talk:Coal/Archive 1">1</a>, <a href="/wiki/Talk:Coal/Archive_2" title="Talk:Coal/Archive 2">2</a>, <a href="/wiki/Talk:Coal/Archive_3" title="Talk:Coal/Archive 3">3</a><span style="position: relative; top: 2px; float: right; font-size: 90%; margin-left: 1em;"><style data-mw-deduplicate="TemplateStyles:r1038841319">.mw-parser-output .tooltip-dotted{border-bottom:1px dotted;cursor:help}</style><span class="rt-commentedText tooltip tooltip-dotted" title="Discussions with timestamps are automatically archived by Lowercase sigmabot III after 90 days of inactivity.">Auto-archiving period</span>: <b>3 months</b> <span typeof="mw:File"><a href="/wiki/Help:Archiving_a_talk_page#Automated_archiving" title="Help:Archiving a talk page"><img alt="" src="//upload.wikimedia.org/wikipedia/en/thumb/1/1d/Information_icon4.svg/16px-Information_icon4.svg.png" decoding="async" width="16" height="16" class="mw-file-element" srcset="//upload.wikimedia.org/wikipedia/en/thumb/1/1d/Information_icon4.svg/24px-Information_icon4.svg.png 1.5x, //upload.wikimedia.org/wikipedia/en/thumb/1/1d/Information_icon4.svg/32px-Information_icon4.svg.png 2x" data-file-width="620" data-file-height="620"/></a></span></span></td> </tr><tr><td style="border-top: 1px solid #c0c090; padding: 0;"><div> <div class="mw-inputbox-centered" style=""><form name="searchbox" class="searchbox mw-inputbox-form-inline" action="/wiki/Special:Search"><div class="cdx-text-input"><input class="mw-searchInput searchboxInput cdx-text-input__input" name="search" placeholder="" size="50" dir="ltr"/></div><input type="hidden" value="Talk:Coal/" name="prefix"/> <input type="submit" name="fulltext" value="Search archives" class="cdx-button"/><input type="hidden" value="Search" name="fulltext"/></form></div> </div></td> </tr> </tbody></table> <p class="mw-empty-elt"> </p> <meta property="mw:PageProp/toc"/> <div class="mw-heading mw-heading2 ext-discussiontools-init-section"><h2 id="Writing_Style" data-mw-thread-id="h-Writing_Style-2009-08-30T15:59:00.000Z"><span data-mw-comment-start="" id="h-Writing_Style-2009-08-30T15:59:00.000Z"></span>Writing Style<span data-mw-comment-end="h-Writing_Style-2009-08-30T15:59:00.000Z"></span></h2><div class="ext-discussiontools-init-section-bar"><div class="ext-discussiontools-init-section-metadata"></div><div class="ext-discussiontools-init-section-actions"></div></div></div> <p><span data-mw-comment-start="" id="c-71.116.73.122-2009-08-30T15:59:00.000Z-Writing_Style"></span>The second paragraph of the article begins with a long and poorly written sentence. It should be revised to make it easier to read. There is nothing in the factual content of the sentence that needs to change. </p> <dl><dd><i>Coal was formed from layer upon layer of annual plant remains accumulating slowly that were protected from biodegradation by usually acidic covering waters that gave a natural antiseptic effect combating microorganisms and then later mud deposits protecting against oxidization in the widespread shallow seas — mainly during the Carboniferous period — thus trapping atmospheric carbon in the ground in immense peat bogs that eventually were covered over and deeply buried by sediments under which they metamorphosed into coal.</i> <span style="font-size: smaller;" class="autosigned">—Preceding <a href="/wiki/Wikipedia:Signatures" title="Wikipedia:Signatures">unsigned</a> comment added by <a href="/wiki/Special:Contributions/71.116.73.122" title="Special:Contributions/71.116.73.122">71.116.73.122</a> (<a href="/wiki/User_talk:71.116.73.122" title="User talk:71.116.73.122">talk</a>) <a href="https://en.wikipedia.org/wiki/Talk:Coal#c-71.116.73.122-2009-08-30T15:59:00.000Z-Writing_Style" class="ext-discussiontools-init-timestamplink">15:59, 30 August 2009 (UTC)</a><span data-mw-comment-end="c-71.116.73.122-2009-08-30T15:59:00.000Z-Writing_Style"></span></span><span class="ext-discussiontools-init-replylink-buttons" data-mw-thread-id="c-71.116.73.122-2009-08-30T15:59:00.000Z-Writing_Style"><span class="ext-discussiontools-init-replylink-bracket">[</span><a class="ext-discussiontools-init-replylink-reply" role="button" tabindex="0" href="">reply</a><span class="ext-discussiontools-init-replylink-bracket">]</span></span></dd></dl> <div class="mw-heading mw-heading2 ext-discussiontools-init-section"><h2 id="Footer_box_seems_out_of_place" data-mw-thread-id="h-Footer_box_seems_out_of_place-2009-04-16T06:20:00.000Z"><span data-mw-comment-start="" id="h-Footer_box_seems_out_of_place-2009-04-16T06:20:00.000Z"></span>Footer box seems out of place<span data-mw-comment-end="h-Footer_box_seems_out_of_place-2009-04-16T06:20:00.000Z"></span></h2><div class="ext-discussiontools-init-section-bar"><div class="ext-discussiontools-init-section-metadata"></div><div class="ext-discussiontools-init-section-actions"></div></div></div> <p><span data-mw-comment-start="" id="c-Tbsdy_lives-2009-04-16T06:20:00.000Z-Footer_box_seems_out_of_place"></span>This footer box seems out of place. Coal is used all over the world. Why would we only care about Energy Use in the U.S.? - <a href="/wiki/User:Tbsdy_lives" title="User:Tbsdy lives">Tbsdy lives</a> (formerly <a href="/wiki/User:Ta_bu_shi_da_yu" title="User:Ta bu shi da yu">Ta bu shi da yu</a>) <sup><a href="/wiki/User_talk:Tbsdy_lives" class="mw-redirect" title="User talk:Tbsdy lives">talk</a></sup> <a href="https://en.wikipedia.org/wiki/Talk:Coal#c-Tbsdy_lives-2009-04-16T06:20:00.000Z-Footer_box_seems_out_of_place" class="ext-discussiontools-init-timestamplink">06:20, 16 April 2009 (UTC)</a><span class="ext-discussiontools-init-replylink-buttons" data-mw-thread-id="c-Tbsdy_lives-2009-04-16T06:20:00.000Z-Footer_box_seems_out_of_place"><span class="ext-discussiontools-init-replylink-bracket">[</span><a class="ext-discussiontools-init-replylink-reply" role="button" tabindex="0" href="">reply</a><span class="ext-discussiontools-init-replylink-bracket">]</span></span><span data-mw-comment-end="c-Tbsdy_lives-2009-04-16T06:20:00.000Z-Footer_box_seems_out_of_place"></span> </p> <div class="mw-heading mw-heading2 ext-discussiontools-init-section"><h2 id="waste_products_or_resourses?" data-mw-thread-id="h-waste_products_or_resourses?-2009-08-08T03:40:00.000Z"><span id="waste_products_or_resourses.3F"></span><span data-mw-comment-start="" id="h-waste_products_or_resourses?-2009-08-08T03:40:00.000Z"></span>waste products or resourses?<span data-mw-comment-end="h-waste_products_or_resourses?-2009-08-08T03:40:00.000Z"></span></h2><div class="ext-discussiontools-init-section-bar"><div class="ext-discussiontools-init-section-metadata"></div><div class="ext-discussiontools-init-section-actions"></div></div></div> <p><span data-mw-comment-start="" id="c-82.5.68.95-2009-08-08T03:40:00.000Z-waste_products_or_resourses?"></span>Some of the waste products of coal combustion are listed as mercury, uranium, thorium, arsenic and other heavy metals. Surely these are valuable by-products rather than waste-products (assuming they can be successfully extracted). Or am I being hopelessly niave...? <span style="font-size: smaller;" class="autosigned">—Preceding <a href="/wiki/Wikipedia:Signatures" title="Wikipedia:Signatures">unsigned</a> comment added by <a href="/wiki/Special:Contributions/82.5.68.95" title="Special:Contributions/82.5.68.95">82.5.68.95</a> (<a href="/wiki/User_talk:82.5.68.95" title="User talk:82.5.68.95">talk</a>) <a href="https://en.wikipedia.org/wiki/Talk:Coal#c-82.5.68.95-2009-08-08T03:40:00.000Z-waste_products_or_resourses?" class="ext-discussiontools-init-timestamplink">03:40, 8 August 2009 (UTC)</a></span><span class="ext-discussiontools-init-replylink-buttons" data-mw-thread-id="c-82.5.68.95-2009-08-08T03:40:00.000Z-waste_products_or_resourses?"><span class="ext-discussiontools-init-replylink-bracket">[</span><a class="ext-discussiontools-init-replylink-reply" role="button" tabindex="0" href="">reply</a><span class="ext-discussiontools-init-replylink-bracket">]</span></span><span data-mw-comment-end="c-82.5.68.95-2009-08-08T03:40:00.000Z-waste_products_or_resourses?"></span> </p> <dl><dd><span data-mw-comment-start="" id="c-TharsHammar-2009-10-29T02:28:00.000Z-82.5.68.95-2009-08-08T03:40:00.000Z"></span>Yes, you are being hopelessly niave :). The mercury is on the parts per billion levels but when you burn millions of tons of coal it adds up to a problem. Coal is mined from coal mines because thats where there is a high concentration of coal. Mercury is mined from mercury mines because that is where there is a high concentration of mercury, same goes for uranium, thorium, etc, etc. It needs to be a concentrated stream of a metal to be valuable (ofcourse concentrated varys with how difficult it is to seperate the choice metal and the metal price!) <a href="/wiki/User:TharsHammar" title="User:TharsHammar">TharsHammar</a><sup><i> <a href="/wiki/Special:Contributions/TharsHammar" title="Special:Contributions/TharsHammar">Bits</a></i></sup> and<sup><i><a href="/wiki/User_talk:TharsHammar#top" title="User talk:TharsHammar">Pieces</a></i></sup> <a href="https://en.wikipedia.org/wiki/Talk:Coal#c-TharsHammar-2009-10-29T02:28:00.000Z-82.5.68.95-2009-08-08T03:40:00.000Z" class="ext-discussiontools-init-timestamplink">02:28, 29 October 2009 (UTC)</a><span class="ext-discussiontools-init-replylink-buttons" data-mw-thread-id="c-TharsHammar-2009-10-29T02:28:00.000Z-82.5.68.95-2009-08-08T03:40:00.000Z"><span class="ext-discussiontools-init-replylink-bracket">[</span><a class="ext-discussiontools-init-replylink-reply" role="button" tabindex="0" href="">reply</a><span class="ext-discussiontools-init-replylink-bracket">]</span></span><span data-mw-comment-end="c-TharsHammar-2009-10-29T02:28:00.000Z-82.5.68.95-2009-08-08T03:40:00.000Z"></span></dd></dl> <div class="mw-heading mw-heading2 ext-discussiontools-init-section"><h2 id="British_coal...best_in_the_world..." data-mw-thread-id="h-British_coal...best_in_the_world...-2009-08-08T04:09:00.000Z"><span data-mw-comment-start="" id="h-British_coal...best_in_the_world...-2009-08-08T04:09:00.000Z"></span>British coal...best in the world...<span data-mw-comment-end="h-British_coal...best_in_the_world...-2009-08-08T04:09:00.000Z"></span></h2><div class="ext-discussiontools-init-section-bar"><div class="ext-discussiontools-init-section-metadata"></div><div class="ext-discussiontools-init-section-actions"></div></div></div> <p><span data-mw-comment-start="" id="c-82.5.68.95-2009-08-08T04:09:00.000Z-British_coal...best_in_the_world..."></span>Please tell me thet there is an oversight in the "Proved Recoverable Coal Resources at the End of 2006" table. I was given to understand (by my school geography teachers) that there were about 200 gigatonnes of bituminous coal still recoverable from under the land area of Great Britain (in spite of the demand that the Industrial Revolution placed upon mineral wealth of the British Isles). Yet, I can find no mention of British Coal Reserves in the above table. This is a considerable let-down, since I had assumed that Great Britain would "fall back" upon her coal reserves, once the North Sea oil and gas were exhausted (a possibility that seems to be looming with alarming rapidity, given the emphasis we now seem to have to place on Russian oil and gas reserves....). </p><p><a href="/wiki/Special:Contributions/82.5.68.95" title="Special:Contributions/82.5.68.95">82.5.68.95</a> (<a href="/wiki/User_talk:82.5.68.95" title="User talk:82.5.68.95">talk</a>) <a href="https://en.wikipedia.org/wiki/Talk:Coal#c-82.5.68.95-2009-08-08T04:09:00.000Z-British_coal...best_in_the_world..." class="ext-discussiontools-init-timestamplink">04:09, 8 August 2009 (UTC)</a><span class="ext-discussiontools-init-replylink-buttons" data-mw-thread-id="c-82.5.68.95-2009-08-08T04:09:00.000Z-British_coal...best_in_the_world..."><span class="ext-discussiontools-init-replylink-bracket">[</span><a class="ext-discussiontools-init-replylink-reply" role="button" tabindex="0" href="">reply</a><span class="ext-discussiontools-init-replylink-bracket">]</span></span><span data-mw-comment-end="c-82.5.68.95-2009-08-08T04:09:00.000Z-British_coal...best_in_the_world..."></span> </p> <dl><dd><span data-mw-comment-start="" id="c-TharsHammar-2009-10-29T02:25:00.000Z-82.5.68.95-2009-08-08T04:09:00.000Z"></span>The coal might be the best in the world, but if it is in a location where you have to move a lot of dirt to get to it then its no longer economicially viable to mine, and thus not <b>recoverable</b> because no one would recover them for a loss! <a href="/wiki/User:TharsHammar" title="User:TharsHammar">TharsHammar</a><sup><i> <a href="/wiki/Special:Contributions/TharsHammar" title="Special:Contributions/TharsHammar">Bits</a></i></sup> and<sup><i><a href="/wiki/User_talk:TharsHammar#top" title="User talk:TharsHammar">Pieces</a></i></sup> <a href="https://en.wikipedia.org/wiki/Talk:Coal#c-TharsHammar-2009-10-29T02:25:00.000Z-82.5.68.95-2009-08-08T04:09:00.000Z" class="ext-discussiontools-init-timestamplink">02:25, 29 October 2009 (UTC)</a><span class="ext-discussiontools-init-replylink-buttons" data-mw-thread-id="c-TharsHammar-2009-10-29T02:25:00.000Z-82.5.68.95-2009-08-08T04:09:00.000Z"><span class="ext-discussiontools-init-replylink-bracket">[</span><a class="ext-discussiontools-init-replylink-reply" role="button" tabindex="0" href="">reply</a><span class="ext-discussiontools-init-replylink-bracket">]</span></span><span data-mw-comment-end="c-TharsHammar-2009-10-29T02:25:00.000Z-82.5.68.95-2009-08-08T04:09:00.000Z"></span></dd></dl> <div class="mw-heading mw-heading2 ext-discussiontools-init-section"><h2 id="Coal_as_a_traded_commodity" data-mw-thread-id="h-Coal_as_a_traded_commodity-2009-10-29T02:11:00.000Z"><span data-mw-comment-start="" id="h-Coal_as_a_traded_commodity-2009-10-29T02:11:00.000Z"></span>Coal as a traded commodity<span data-mw-comment-end="h-Coal_as_a_traded_commodity-2009-10-29T02:11:00.000Z"></span></h2><div class="ext-discussiontools-init-section-bar"><div class="ext-discussiontools-init-section-metadata"></div><div class="ext-discussiontools-init-section-actions"></div></div></div> <p><span data-mw-comment-start="" id="c-TharsHammar-2009-10-29T02:11:00.000Z-Coal_as_a_traded_commodity"></span>This section is a little bogus since most coal is sold via long-term contracts between mines and plants. Just like there are different grades of crude (heavy, light, sweet, sour) there are many grades of coal. Just as not all refineries can handle all types of crude most plants are configured/optimized to run a certain type of coal (no one would put a low sulfur high volative PRB coal into a boiler designed for Ill #6). What coal price should be cited - Eastern Bit Coal, Sub-bit PRB coal, maybe a German brown or a South African? Citing the market price of each will have different stories show. I recommend a drastic re-writing of this selection to highlight the price-stability of coal as well as the price variations between different coal grades. Anyone else have other ideas? <a href="/wiki/User:TharsHammar" title="User:TharsHammar">TharsHammar</a><sup><i> <a href="/wiki/Special:Contributions/TharsHammar" title="Special:Contributions/TharsHammar">Bits</a></i></sup> and<sup><i><a href="/wiki/User_talk:TharsHammar#top" title="User talk:TharsHammar">Pieces</a></i></sup> <a href="https://en.wikipedia.org/wiki/Talk:Coal#c-TharsHammar-2009-10-29T02:11:00.000Z-Coal_as_a_traded_commodity" class="ext-discussiontools-init-timestamplink">02:11, 29 October 2009 (UTC)</a><span class="ext-discussiontools-init-replylink-buttons" data-mw-thread-id="c-TharsHammar-2009-10-29T02:11:00.000Z-Coal_as_a_traded_commodity"><span class="ext-discussiontools-init-replylink-bracket">[</span><a class="ext-discussiontools-init-replylink-reply" role="button" tabindex="0" href="">reply</a><span class="ext-discussiontools-init-replylink-bracket">]</span></span><span data-mw-comment-end="c-TharsHammar-2009-10-29T02:11:00.000Z-Coal_as_a_traded_commodity"></span> </p></div><noscript><img src="https://login.wikimedia.org/wiki/Special:CentralAutoLogin/start?type=1x1" alt="" width="1" height="1" style="border: none; position: absolute;"></noscript> <div class="printfooter" data-nosnippet="">Retrieved from "<a dir="ltr" href="https://en.wikipedia.org/w/index.php?title=Talk:Coal&oldid=322663079">https://en.wikipedia.org/w/index.php?title=Talk:Coal&oldid=322663079</a>"</div></div> <div id="catlinks" class="catlinks" data-mw="interface"><div id="mw-normal-catlinks" class="mw-normal-catlinks"><a href="/wiki/Help:Category" title="Help:Category">Categories</a>: <ul><li><a href="/wiki/Category:Unassessed_software_articles" title="Category:Unassessed software articles">Unassessed software articles</a></li><li><a href="/wiki/Category:Unknown-importance_software_articles" title="Category:Unknown-importance software articles">Unknown-importance software articles</a></li><li><a href="/wiki/Category:Unassessed_software_articles_of_Unknown-importance" title="Category:Unassessed software articles of Unknown-importance">Unassessed software articles of Unknown-importance</a></li><li><a href="/wiki/Category:Unassessed_Computing_articles" title="Category:Unassessed Computing articles">Unassessed Computing articles</a></li><li><a href="/wiki/Category:Unknown-importance_Computing_articles" title="Category:Unknown-importance Computing articles">Unknown-importance Computing articles</a></li><li><a href="/wiki/Category:All_Computing_articles" title="Category:All Computing articles">All Computing articles</a></li><li><a href="/wiki/Category:All_Software_articles" title="Category:All Software articles">All Software articles</a></li><li><a href="/wiki/Category:B-Class_Geology_articles" title="Category:B-Class Geology articles">B-Class Geology articles</a></li><li><a href="/wiki/Category:High-importance_Geology_articles" title="Category:High-importance Geology articles">High-importance Geology articles</a></li><li><a href="/wiki/Category:High-importance_B-Class_Geology_articles" title="Category:High-importance B-Class Geology articles">High-importance B-Class Geology articles</a></li><li><a href="/wiki/Category:WikiProject_Geology_articles" title="Category:WikiProject Geology articles">WikiProject Geology articles</a></li><li><a href="/wiki/Category:B-Class_energy_articles" title="Category:B-Class energy articles">B-Class energy articles</a></li><li><a href="/wiki/Category:Top-importance_energy_articles" title="Category:Top-importance energy articles">Top-importance energy articles</a></li><li><a href="/wiki/Category:B-Class_Environment_articles" title="Category:B-Class Environment articles">B-Class Environment articles</a></li><li><a href="/wiki/Category:High-importance_Environment_articles" title="Category:High-importance Environment articles">High-importance Environment articles</a></li></ul></div><div id="mw-hidden-catlinks" class="mw-hidden-catlinks mw-hidden-cats-hidden">Hidden categories: <ul><li><a href="/wiki/Category:WikiProject_banners_with_class_parameter_that_needs_moving_to_banner_shell" title="Category:WikiProject banners with class parameter that needs moving to banner shell">WikiProject banners with class parameter that needs moving to banner shell</a></li><li><a href="/wiki/Category:Pages_using_Talk_header_with_deprecated_parameters" title="Category:Pages using Talk header with deprecated parameters">Pages using Talk header with deprecated parameters</a></li></ul></div></div> </div> </main> </div> <div class="mw-footer-container"> <footer id="footer" class="mw-footer" > <ul id="footer-info"> <li id="footer-info-lastmod"> This page was last edited on 29 October 2009, at 02:28<span class="anonymous-show"> (UTC)</span>.</li> <li id="footer-info-copyright"><span class="nowraplinks">This version of the page has been <a href="/wiki/Help:Page_history" title="Help:Page history">revised</a>. 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