The lower house of the German parliament voted 513-79 last week to shut down the nation’s nuclear power plants by the end of 2022. As late as last year, the government had planned on extending the life span of the country’s 17 reactors, but has changed course since the disaster at Japan’s Fukushima Dai-ichi plant. To make up for the lost power, the country is aiming to double the share of energy it gets from water, wind, sun or biogas by 2020, to at least 35 percent.