Annual US wind power installations. Source <a rel="nofollow" class="external autonumber" href="http://www.awea.org/AnnualMarketReport.aspx?ItemNumber=7418&amp;RDtoken=6484">[1]</a>
<a href="//commons.wikimedia.org/wiki/User:Delphi234" title="User:Delphi234">Delphi234</a>
2015-05-14
<span class="int-own-work" lang="en">Own work</span>