How China’s horrific air quality magically turns cleaner: cotton

China is known for having some of the most polluted air in the world. But officials in one Chinese city found a way to at least make that air appear cleaner, for awhile. Like many Chinese cities, Xi’an, the provincial capital of Shaanxi, in the northern part of the country, has air-monitoring equipment. DON’T MISS: Coal in China: huge problem for… …read more