<http://schema.org/about>
"The main downside of wind power has always been its intermittent nature. Despite being one of the world's fastest growing sources of renewable energy, it continues to account for only slim percentages of most countries' electricity production (save"^^<http://www.w3.org/2001/XMLSchema#string>
<http://www.treehugger.com/clean-technology/connecting-the-worlds-wind-farms.html>