From Pittsburgh to Frankfurt, cities around the world are pledging to stop burning fossil fuels for electricity by 2050 or sooner. But the Chinese province of Qinghai has already reached that goal, according to news outlet Xinhua. For seven days — from June 17 to 23 — the region ran on 100% renewable energy, including solar, wind, and hydropower. The week was part of a trial conducted by the State Grid Corporation of China, which aims to test the