Where did you go to university? <a href=" http://www.clearofclouds.ch/essay-helpers/#examine ">what is a thesis project</a> Unlikely. How much of the world’s electricity do solar and wind produce? After decades of subsidies, less than 1%. The reasons for this have been well understood for decades. Because sunlight and wind are low-density energy, they require vast land and material resources to capture. And worse, because sunlight and wind are unreliable energy, they always need a backup, which is almost always fossil fuels.