All of California is expected to run on renewable energy by 2050

It’s becoming more and more obvious, if it wasn’t already, that we don’t have that much time to cut greenhouse gas emissions before climate change is out of control: One recent U.N. report suggests that energy systems will have to completely transform by 2050. So what might that actually look like? One new project involves mapping out the details state by state, starting with a vision of a smog-free California in which every car and truck would run on electricity or fuel cells, and every watt of electricity would come from renewable sources like solar, wind, and wave power.