Why's China's Smog Crisis Still Burning So Hot?
Alex Wang:On Sunday, the start of the winter heating season in northern China brought the “airpocalypse” back with a vengeance.Harbin, the capital of Heilongjiang Province and home to 11 million people, registered fine particulate (PM2.5) pollution levels beyond 500, the top of the scale on the Chinese Air Quality Index, a level which is considered hazardous to human health.