Our post-carbon future is already here—if you know where to look

This year has seen one environmental catastrophe after another. Collapsing glaciers triggered a devastating flood in Nepal, heat waves in Europe caused more than 35,000 deaths, and extreme temperature swings in the Midwest destroyed crops. “The climate alarm is blaring in every direction,” Simon Stiell, the executive secretary of UN Climate Change, said earlier this year. According to a recent report from the UN, the world is on course to cross the average warming level of 1.5 degree Celsius...