solana
Dennis Schroeder/NREL

While the news about climate change seems to get worse every day, the rapidly improving technology, declining costs, and increasing accessibility of clean energy is the true bright spot in the march toward a zero-carbon future. 2013 had more clean energy milestones than we could fit on one page, but here are 13 of the key breakthroughs that happened this year.

1. Using salt to keep producing solar power even when the sun goes down. Helped along by the Department of Energy’s loan program, Solana’s massive 280 megawatt (MW) solar plant came online in Arizona this October, with one unique distinction: the plant will use a ‘salt battery’ that will allow it to keep generating electricity even when the sun isn’t shining. Not only is this a first for the United States in terms of thermal energy storage, the Solana plant is also the largest in the world to use to use parabolic trough mirrors to concentrate solar energy.