9 years ago
China's smog kills more than a million each year – but there's a clearer road ahead
Air pollution is rarely a major concern for most people in Western Europe. You seldom notice it except when sitting in heavy traffic or when it obscures the far horizon at a scenic spot. However until the middle of last century it was a different story, with heavy industry and domestic heating filling city air with smoke, noxious gases and ozone.
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