Is Solar Energy Renewable?

Solar panels cover a hillside in Fujian province, China.
Solar panels cover a hillside in Fujian province, China. Longhu
In addition to being the cheapest form of electricity in world history, according to the International Energy Agency, solar energy is renewable and will continue to be until the sun begins to run out of hydrogen two billion years from now.1 But what about the panels that harvest that energy and turn it into electricity? Is that process clean, green, and sustainable? Or does solar energy do more environmental harm than good? This article breaks down just how eco-friendly solar energy is.