China has slashed air pollution, but the 'war' isn't over
Fifteen years ago, Beijing's Liangma riverbanks would have been smog-choked and deserted in winter, but these days they are dotted with families and exercising pensioners most mornings. The turnaround is the result of a years-long campaign that threw China's state power behind policies like moving factories and electrifying vehicles, to improve some of the world's worst air quality. Poll