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1960-2006Ten Most Visited National ParksNational Historical ParksNational MonumentsNational PreservesNational ReservesNational Military ParksNational BattlefieldsNational Battlefield ParksNational Battlefield SiteNational Historic SitesNational MemorialsNational Cemeteries1National SeashoresParkwaysNational LakeshoresNational Park System RiversOther ParksNational Recreation AreasNational Scenic Trails1International Historic SiteLargest Nuclear Power Plants in the U.S.National Forest System, 1900-2004World Energy Consumption and Carbon Dioxide Emissions, 1990â€“2025America\u0027s Ten Most Endangered Rivers, 2006Historical and Projected Capacities for Nuclear Electricity Generation, 1996â€“2020World Net Electricity Consumption by Selected Regions, 1990â€“2025U.S. Emissions of Greenhouse Gases, 2001â€“2006Air Quality in Selected U.S. Cities, 1990â€“2000Greatest Oil Reserves by Country, 2006Greatest Natural Gas Reserves by Country, 2006NATIONAL PARKSMost and Least Fuel Efficient Vehicles, 2008America\u0027s 25 Most Ozone-Polluted Metropolitan Areas, 2006Top Energy Producers and Consumers, 2006Top World Oil Producers, Exporters, Consumers, and Importers, 2006International ParkNational Historic AreaNational Heritage AreasNational Heritage CorridorsNational Historic Trails1Top Ten Types of Debris Littering the Oceans2008 Environmental Performance IndexThe Toxic 100: Top Corporate Air Polluters in the United StatesThe Top Carbon Dioxide EmittersDrinking Water and Sanitation Around the WorldTop Energy Producers and Consumers, 2008Retail Motor Gasoline Prices in Selected Countries, 2006Retail Motor Gasoline Prices in Selected Countries, 2015Greatest Oil Reserves by CountryTop Energy Producers and Consumers, 2008Top Oil Producers and Consumers, 2010Top Oil Producers and Consumers, 2011Top Oil Producers and Consumers, 2012Top Oil Producers and Consumers, 2013U.S. Energy Consumption by Energy Source, 2002â€“2012Sources of U.S. Oil ImportsWorld Carbon Dioxide Emissions From Energy Consumption, 2004World Primary Energy Consumption by Region, 1995â€“2004World Primary Energy Production by Region, 1995â€“2004World Primary Energy Production by Source, 1970â€“2007America\u0027s Ten Most Endangered Rivers, 2007America\u0027s Ten Most Endangered Rivers, 2008America\u0027s Ten Most Endangered Rivers, 2010America\u0027s Ten Most Endangered Rivers, 2011America\u0027s Ten Most Endangered Rivers, 2012America\u0027s Ten Most Endangered Rivers, 2013America\u0027s 25 Most Ozone-Polluted Metropolitan Areas, 2013America\u0027s 25 Most Ozone-Polluted Metropolitan Areas2014 Environmental Performance IndexMost and Least Fuel Efficient Vehicles, 2005America\u0027s Top Ten Greenest BuildingsTen Most Visited National Parks, 2012Ten Most Visited National Parks, 2013Ten Most Visited National Parks, 2015The Pilot 2006 Environmental Performance IndexThirstiest CropsThe Toxic 100: Top Corporate Air Polluters in the United States, 2010The Toxic 100: Top Corporate Air Polluters in the 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class="we-mega-menu-li" title="" href="/us/race" target=""> Race & Ethnicity </a> </li><li class="we-mega-menu-li" data-level="2" data-element-type="we-mega-menu-li" data-id="7681b583-1195-42e1-a3ce-91f80e657ed5" data-submenu="0" hide-sub-when-collapse="0"> <a class="we-mega-menu-li" title="" href="/us/states" target=""> States </a> </li><li class="we-mega-menu-li" data-level="2" data-element-type="we-mega-menu-li" data-id="59e82755-eb02-450d-81cf-dd9e5d00fd6f" data-submenu="0" hide-sub-when-collapse="0"> <a class="we-mega-menu-li" title="" href="/us/us-statistics" target=""> Statistics </a> </li><li class="we-mega-menu-li" data-level="2" data-element-type="we-mega-menu-li" data-id="78a597de-29f1-4bc8-b0a7-6ed1c8e90bf2" data-submenu="0" hide-sub-when-collapse="0"> <a class="we-mega-menu-li" title="" href="/culture-entertainment" target=""> Arts & Entertainment </a> </li><li class="we-mega-menu-li" data-level="2" data-element-type="we-mega-menu-li" 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target=""> Math & Science Overview </a> </li><li class="we-mega-menu-li" data-level="2" data-element-type="we-mega-menu-li" data-id="a924bf45-ec7b-4870-97a9-fc046d125d37" data-submenu="0" hide-sub-when-collapse="0"> <a class="we-mega-menu-li" title="" href="/math-science/aviation" target=""> Aviation </a> </li><li class="we-mega-menu-li" data-level="2" data-element-type="we-mega-menu-li" data-id="0b4e7ad8-b50a-469c-934a-2f3e129fe476" data-submenu="0" hide-sub-when-collapse="0"> <a class="we-mega-menu-li" title="" href="/math-science/biology" target=""> Biology </a> </li><li class="we-mega-menu-li" data-level="2" data-element-type="we-mega-menu-li" data-id="5d21d31e-4f9b-4610-8779-69692b65c49d" data-submenu="0" hide-sub-when-collapse="0"> <a class="we-mega-menu-li" title="" href="/math-science/computers-internet" target=""> Computers & Internet </a> </li><li class="we-mega-menu-li active active-trail" data-level="2" data-element-type="we-mega-menu-li" 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href="/math-science/mathematics" target=""> Mathematics </a> </li><li class="we-mega-menu-li" data-level="2" data-element-type="we-mega-menu-li" data-id="f306cda5-cdc9-476e-9d51-4e64af61e583" data-submenu="0" hide-sub-when-collapse="0"> <a class="we-mega-menu-li" title="" href="/math-science/physics" target=""> Physics </a> </li><li class="we-mega-menu-li" data-level="2" data-element-type="we-mega-menu-li" data-id="37a433fe-ab89-4d18-b369-3ea72e8ad9fc" data-submenu="0" hide-sub-when-collapse="0"> <a class="we-mega-menu-li" title="" href="/math-science/space" target=""> Space </a> </li><li class="we-mega-menu-li" data-level="2" data-element-type="we-mega-menu-li" data-id="92382932-5ad4-4351-832a-94d653aa683c" data-submenu="0" hide-sub-when-collapse="0"> <a class="we-mega-menu-li" title="" href="/math-science/weather" target=""> Weather </a> </li><li class="we-mega-menu-li" data-level="2" data-element-type="we-mega-menu-li" data-id="7aad6b27-5acb-4bac-8acf-be91c836bbb8" data-submenu="0" hide-sub-when-collapse="0"> <a class="we-mega-menu-li" title="" href="/math-science/weights-measures" target=""> Weights & Measures </a> </li> </ul> </div> </div> </div> </div> </li><li class="we-mega-menu-li dropdown-menu we-mega-menu-group" data-level="1" data-element-type="we-mega-menu-li" data-id="29a78c62-ce20-4f1e-bb70-da47b92141ae" data-submenu="1" hide-sub-when-collapse="0" data-group="1"> <span data-drupal-link-system-path="<front>" class="we-megamenu-nolink">Calendar & Holidays<i class="arrow down"></i></span> <div class="we-mega-menu-submenu" data-element-type="we-mega-menu-submenu"> <div class="we-mega-menu-submenu-inner"> <div class="we-mega-menu-row" data-element-type="we-mega-menu-row" data-custom-row="0"> <div class="we-mega-menu-col span12" data-element-type="we-mega-menu-col" data-width="12" data-hidewhencollapse="0"> <ul class="nav nav-tabs subul"> <li class="we-mega-menu-li" data-level="2" data-element-type="we-mega-menu-li" 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Environment </li> </ol> </nav> <h1 class="page-title"><span>Earth & Environment</span> </h1> <section class = "main-section col-sm-12" id="mainaside"> <div data-drupal-messages-fallback class="hidden"></div> <article data-history-node-id="81026">  <div class="addthis_toolbox addthis_default_style" style="float:right;width:auto;height:auto;margin:0 6px 0 0;padding:0;border:1px solid #fff;background-color:#fff;"><a href="/citing-infoplease"><img src="/sites/default/files/i_infopls_com/images/IPcite.gif" style="vertical-align:middle;" />Cite</a></div>  <p><b>Environment</b> covers air pollutants, global warming, the greenhouse effect, and other dangers to the planet. It also includes a glossary of environmental terms as well as a brief directory of environmental organizations. <b>Energy</b> details world and U.S. energy consumption, renewable energy, the world's largest oil and gas reserves, and nuclear power. <b>Nature</b> discusses the Earth's wide variety of animals and plants and its endangered species.</p> <p><a href="https://www.infoplease.com/math-science/earth-environment/ocean-crisis-how-technology-can-help">Crisis in the Ocean: How Technology Can Help</a></p> <p><a href="/math-science/earth-environment/an-extraordinary-approach">An Extraordinary Approach</a></p> <p><a href="/math-science/earth-environment/fuel-cell-faqs">Fuel Cell FAQs</a></p> <p><a href="/math-science/earth-environment/the-greenhouse-gas-effect">The Greenhouse Gas Effect</a></p> <p><a href="/math-science/earth-environment/global-warming">Global Warming</a></p> <p><a href="/math-science/earth-environment/the-national-park-system">The National Park System</a></p> <p><a href="/math-science/earth-environment/electric-cars-powered-by-gasoline">Electric Cars Powered By Gasoline?</a></p> <p><a href="/math-science/earth-environment/rethinking-old-technology">Rethinking Old Technology</a></p> <p><a href="/math-science/earth-environment/energy-websites">Energy Websites</a></p> <p><a href="/math-science/earth-environment/major-biomes-of-the-world">Major Biomes of the World</a></p> <p><a href="/math-science/earth-environment/coniferous-forest">Coniferous Forest</a></p> <p><a href="/math-science/earth-environment/deciduous-forest">Deciduous Forest</a></p> <p><a href="/math-science/earth-environment/desert">Desert</a></p> <p><a href="/math-science/earth-environment/grasslands">Grasslands</a></p> <p><a href="/math-science/earth-environment/mountains">Mountains</a></p> <p><a href="/math-science/earth-environment/rainforests">Rainforests</a></p> <p><a href="/math-science/earth-environment/arctic-tundra">Arctic Tundra</a></p> <p><a href="/math-science/earth-environment/fukushima-daiichi-nuclear-power-station">Fukushima Daiichi Nuclear Power Station</a></p> <p><a href="/math-science/earth-environment/users-guide-to-environmental-language">User's Guide to Environmental Language</a></p> <p><a href="/math-science/earth-environment/environmental-organizations">Environmental Organizations</a></p> <p><a href="/math-science/earth-environment/oil-in-the-caspian-region">Oil in the Caspian Region</a></p> <p><a href="/math-science/earth-environment/all-about-ozone">All About Ozone</a></p> <p><a href="/math-science/earth-environment/i-the-ozone-layer">I. 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2007</a></p> <p><a href="/math-science/earth-environment/top-ten-green-hotels-in-the-united-states-2010">Top Ten Green Hotels in the United States, 2010</a></p> <p><a href="/math-science/earth-environment/top-ten-green-hotels-in-the-united-states-2012">Top Ten Green Hotels in the United States, 2012</a></p> <p><a href="/math-science/earth-environment/top-ten-green-hotels-in-the-united-states-2013">Top Ten Green Hotels in the United States, 2013</a></p> <p><a href="/math-science/earth-environment/top-ten-green-hotels-in-the-united-states-2014">Top Ten Green Hotels in the United States, 2014</a></p> <p><a href="/math-science/earth-environment/living-off-the-grid">Living Off the Grid</a></p> <p><a href="/math-science/earth-environment/the-top-10-lowest-radiation-cell-phones-2012">The Top 10 Lowest Radiation Cell Phones, 2012</a></p> <p><a href="/math-science/earth-environment/the-top-10-lowest-radiation-cell-phones-2013">The Top 10 Lowest Radiation Cell Phones, 2013</a></p> <p><a 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