CINXE.COM
Just a moment...
<!DOCTYPE html><html lang="en-US"><head><title>Just a moment...</title><meta http-equiv="Content-Type" content="text/html; charset=UTF-8"><meta http-equiv="X-UA-Compatible" content="IE=Edge"><meta name="robots" content="noindex,nofollow"><meta name="viewport" content="width=device-width,initial-scale=1"><style>*{box-sizing:border-box;margin:0;padding:0}html{line-height:1.15;-webkit-text-size-adjust:100%;color:#313131;font-family:system-ui,-apple-system,BlinkMacSystemFont,Segoe UI,Roboto,Helvetica Neue,Arial,Noto Sans,sans-serif,Apple Color Emoji,Segoe UI Emoji,Segoe UI Symbol,Noto Color Emoji}body{display:flex;flex-direction:column;height:100vh;min-height:100vh}.main-content{margin:8rem auto;max-width:60rem;padding-left:1.5rem}@media (width <= 720px){.main-content{margin-top:4rem}}.h2{font-size:1.5rem;font-weight:500;line-height:2.25rem}@media (width <= 720px){.h2{font-size:1.25rem;line-height:1.5rem}}#challenge-error-text{background-image:url(data:image/svg+xml;base64,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);background-repeat:no-repeat;background-size:contain;padding-left:34px}@media (prefers-color-scheme:dark){body{background-color:#222;color:#d9d9d9}}</style><meta http-equiv="refresh" content="120"></head><body class="no-js"><div class="main-wrapper" role="main"><div class="main-content"><noscript><div class="h2"><span id="challenge-error-text">Enable JavaScript and cookies to continue</span></div></noscript></div></div><script>(function(){window._cf_chl_opt={cvId: '3',cZone: "publications.waset.org",cType: 'non-interactive',cRay: '91340d77e9df87a8',cH: 'SsfFK1WMOJO.sCL0.fOeRENGXEJCCDBMI4sJeBWeTA8-1739777222-1.2.1.1-6zxcozBeTAubUhCyoz5aEjqJJ3OFDcf92HeR5Tuz5BXT954.UlNrxIwQ3HeKNSzT',cUPMDTk: "\/search?q=renewable%20energy&__cf_chl_tk=yMRYG3nIMUrUOgHXaBh2k6irOHrdh0ySeL8L.0P9T8Q-1739777222-1.0.1.1-asHX55TS_AlfH9p_533HSU.wcbfE5wMKH37s0A_VrWw",cFPWv: 'b',cITimeS: '1739777222',cTTimeMs: '1000',cMTimeMs: '120000',cTplC: 0,cTplV: 5,cTplB: 'cf',cK: "",fa: "\/search?q=renewable%20energy&__cf_chl_f_tk=yMRYG3nIMUrUOgHXaBh2k6irOHrdh0ySeL8L.0P9T8Q-1739777222-1.0.1.1-asHX55TS_AlfH9p_533HSU.wcbfE5wMKH37s0A_VrWw",md: "QiIMYYgoSL0tblN_yDkYGpUau4EfV.OxIM6wzAvPV9o-1739777222-1.2.1.1-MB5kzm8VlBdsFyX2n1p0VzJZ5aIVoivy6EbmJSehWKi.PyGFdKyVir.9uxVn.ZGSmZchypDBG7oZbI9bJkBu9cj25VifX3mcmsoG6bIS72U4KGoRiE2pm_w9F8zH03DErqUFBXJBO4Wlre3Iblax7qFsifRsjsXznVNCzNZ_4ZnyZD_8rfCIE1zuezSx_7RhYcsTh0bvQ3psJiKCPPAxk.jFcl8wz112c9uH_kCuPMdkotDYzxWkyMD_NwDZoNg9.VgGsENIV2DyTVeRdtFGfE1FtCk7eaT2s8yMKr9ToHy.VxdNZS9IqkcW4iPdtuQ_klJowy7osKtcfZnM3r3C0Xclog3CMlChqwwsqwBFaHo.vMe9idEuoJcZcJkE9dd584ao7Gfy1WuQ8xy1HutzVAOU06935nmcynWvbbkEkNQI76FcINizzbDDikDgjjOb0.x1eilYBqmaGsL3Yv84wxyC2KJ1bXi9HtzeZ.1G5LgOZG7MYCv5wJVPW8FSoCbslrdV7WYBgMMq.r_Rbp6Go.pxqvCTLg9csiKr73ESoTGJ9iExfYqTFOzxLHxJDYw_5u.ZeTFcVFutXleIWwEZ8R8ILC9gK4Hsnt5Mb7e22OSWMmHAWxwNpJl6ptzPbmBbthqHLObcMRS.dh6sLwi0HvALJUQcHv5IkJ3MXknr5Gp4expCYtw3jryx79mlQEtz5mwIsnsUia4dGj8UEVqCQ1iJdx.mqUHovahCCJRZxPDBgZoiYxwl9n9x470dC_DHEZbCGjYtA9CeZ6SncMuIhDXgai.4lfemc3nipr6Q2U1kiWEg7Ir.l9767QZb5SfYmDb1_TcCwXaGvAMxAF1_qzG0_ex5M8Ci.scapDgF0amjpx4037ybo5ZVgX_8PkPDtM1UUrAH4f3aWY8TbZu9tNdaYCLYojzAWmStrlUjW5t9.neMYdGFT6VnAB_nUqfCqfss8Tk.Rjbl7UeW_Dn2yBdO5y3WJZoMF2PWU_NbSAxRzZqHQG8M9PnUnonMXK_RioJ.bo6SAtAZQCqrOzZkbj6MHsxrcJqoAkkJzI_1_GoEujWULaYhOtRjHGlV.Q4cs2OmZO6JyNsSI0UEmE5iuJ.zVtYLLUR8wjVCQsAzq28y2aovXDVEO1OrG_Ltmucd7D6rFLdJrTxI2S0zmrpBUyqKWDXce2y1Uq1eq0wwkHQk1Wr0Fqpj4WFzVDWvRoEV8CbE9OLrPhjWchW6W9LQImcQK1_iFSqBXkasxHj9EwnCSKGuv7Ibuq3DsGg9VThOCNT55U9dJT8HeiBV_wfrdqNNmT8R6ow7mdyIWtCClwFu7fDWC6JjvV5gK2.DmbmRIPYWFkiQ5.QIKKA1mfwuROlUjjrL22x7Ofz.fClkQ97hzolijQYL0iys5whgcSQygNWLYlp6Xsw6xoxIpROA5Idv1pbQy4JkD00nONl9xCNtx5BI9po8ccyf8aMdxKDyP1DOUHCwiWRUCetLXbycghl82qvsZJjazkJv270QwfXUSMWVwaDUNE_UWNQ5jNXVu81Vt5VcrieBv5.7bGB0vvg6mM59os7ixqb.ZjFvlHL1Rn60TbhuUeab9wVLIFQgdQvPMGiNhE9i9ULW36sP5XQ7xsHEG0V0Jvh6CKmavcxw.r8zNpSJsmhcRfx7Q_1eqz_pRWW3BNeehWytjSYJlxQlDueVLklapUYOz3GFWZk_SVg14Mp.uuFFjO6oJYPo0PKoEEZU.SjDwc7BEaYHLAkhZI7.y6rQBoOY5JXPYonZOOGApKetFdntrOUIpoxF1UlIyTHOwHHY3KZSTXHaAsRXBE6BDiVuqC4MvZeMXk1bWdoVVzM5GG3OwgfwyG0ie.NI1zW2L9H_X2qUjmFcW3yxOxNlr25Q24_rbFAn8Jem8zsdgNJ.nA7rnu0zw0PGE3pXfyAwZGKljpms.RbiYw",mdrd: "XMsqBKuEaLidM5yH5FBncnHu3KWrjgu2O5Rwk.8Eqvw-1739777222-1.2.1.1-_n58_ud1FzvFsVyVIvas3NJacfSVpLBNaR8_2uYJiMQrLSBrw4f2dc9OUwILAl6ynHFpBe0lk8bruXXPvhxmkIhm2CxmZ7jusdQaC76vXB64cM226iq5Nn6A.gtxpCZDV7.PiRPZocKhMvRhL7WdPP8b5PKbmgWCvjfEpgG1Q4z1CkFUsXVZLlE6a5S.GsLkfbDpAFZZHoJa6Osuagr.JmbJP3phgM6B0ERpg1k2vDF6j9e73A3OcZP7x9poU.gbQE.dC2aLJPi7WbEDRejoGQ3EtXLoZS51n9Gf0pnrZS1td0wLOBvZDv9o6vX3GsIoVHsFbXvaXoelNe4coU1.kBsxyXOuVcT5nOnWIgPoPPB4GQBvXAHtSVinbFuTNZgNVqk5sw8wDt2DdczmSmhh8fdDGdU1B5d2pjRxOoz52geZrcsbmGFgREtNuc7W6Xf5MvePSWM2OqcaYt9290A..ThBPoeh776pLAeGf61Y1IdTIk0xh_XRiik_zk1HL6YHRX_G6aZioObOdk.AEnqpLRM8hfjIgb5eiqrGY9uIH_ifK2eh.FsE0VKl0vsH9.8oUBmvI132E9Hqe.FYMOC05yB6tIE8N4v3z8QBAeFu80oJW6q5n1NsDzJhi9OdjYVHW3gzdVOasPLz5nf9p5ZMAA1dtxcKf9w2W3cdlFqVCu3c9ki1XkdsVEtw7aOjrTNMYTHXGnq02Jx1A7TweVpkrJlpd6oqn5BIaC.SafCRuX1MOXyla5DbXWjPc.TEa1B2faVsDhta5ww5qMLvZEbo3F_68WjyS3X0ePvNWM.nvsudJd8CauCHy8K_ChdvkdW6p2cie9e8fMWXdAgwO11qNtFJB6yKhhPyuQ3VsCcL6VY4XyrRY5IrUwlGjGWnkJPqwYDdrSCvNxLfhUepR1vSbCTQ4gxEG2YMBWi9KaGZLKBDBQ0TC6WYKdwE.Ikzl3QhoNERHawfMDUlcCJ_2EFD3Jhl4wyWwCJx.JBdJH93p8s5T_XEcj4HeboVK3lPQtXoU4Nkj2qvom_0GZotKF2KgKy5lWH9PGPicAYv6Gv9U0WADw0ZkGSVncA4ZMym6DYgjijNfAthtrFiESBqSoAv7QW_7FY3lGNBVaO3mRHZjYWI70j9o8Oh5Hv9Z2UgGVkq12Ad5gelBpLIdEK5k20GmZES_s67VvRLbGQfjEcpVZmqXtoXFbMbcvGJkLMfBNOhcfScPpeOErGegj83QB0aips98C.zpcsvHvpmEBOwZYCQYpJ0jhMFsSt6OFhW2v2jawL2FuaMqGSEEzQatuJfbPv3aw8UKypCcso5VcstIBe3kaylcsuVLmEMq2oUjk71RxAOIGCbaUVlbWAfPdUfHdvnZdyNN0w_fOr8eHMVnORc4EDsWUTs7oG51gXu0UhsEKeiuzYGI_W9EgVwD3ZTEFqi7vvMPgXXwm_P9pUGToXee0QqklZbRCUVG3IX3cSGaPYo0mVXR5mipt1BBdYX6wq6biK094cJcr89kA_0cZ5WvRmD7S8lyuVC6w_8g1AtFtHU_M07CFV_nUDLIOMu5lAPGVS4CE.DlIq2I2.DtF1YF7WfmrTfhRIBJ.FZ42AsLGMnJVuNfnXzn0ukZ_B8ItUp5xPWTtQBoNwFdNmm1K0FgPCKeAFmvPFCZLMUiJWVWVdFe4MhhHZ9BQYxHyR9pk84zgVBTatnbProVnm2zjV6kcCTo2MEKF4J9j2X1RrtfMmE.v8Oxucxu7nfHfd.t2asizUsRbDy9IKV9i5Uid9Zj2aoVYajllXOJ144gLptEg65sdpkS_2wI52q6J6.0_Sdd71JVXwPFwjptgOGqYvnv5p8aJ2kg4GCYoQrK149N1UmHlQFWDmyBleBGkHxDbGb10gj.zq7lJCohMfO_OOfTMOukp2uzHYG2QqKFiEPXSY1kysACAMUwMJph9joxT1Ey47t3IywCAioLwSYd0o6P9AQfyvvH.1ou9xPncHm"};var cpo = document.createElement('script');cpo.src = '/cdn-cgi/challenge-platform/h/b/orchestrate/chl_page/v1?ray=91340d77e9df87a8';window._cf_chl_opt.cOgUHash = location.hash === '' && location.href.indexOf('#') !== -1 ? '#' : location.hash;window._cf_chl_opt.cOgUQuery = location.search === '' && location.href.slice(0, location.href.length - window._cf_chl_opt.cOgUHash.length).indexOf('?') !== -1 ? '?' : location.search;if (window.history && window.history.replaceState) {var ogU = location.pathname + window._cf_chl_opt.cOgUQuery + window._cf_chl_opt.cOgUHash;history.replaceState(null, null, "\/search?q=renewable%20energy&__cf_chl_rt_tk=yMRYG3nIMUrUOgHXaBh2k6irOHrdh0ySeL8L.0P9T8Q-1739777222-1.0.1.1-asHX55TS_AlfH9p_533HSU.wcbfE5wMKH37s0A_VrWw" + window._cf_chl_opt.cOgUHash);cpo.onload = function() {history.replaceState(null, null, ogU);}}document.getElementsByTagName('head')[0].appendChild(cpo);}());</script></body></html>