The heavy haze was among the worst seen in Beijing in the past month, despite drastic pollution controls put in force July 20 that included pulling half the city's 3.3 million vehicles off the roads.
It is not known how much the measures, which also included halting most construction and closing some factories in the capital and surrounding provinces, have helped.
Maybe they should have U2 concert to raise funds to buy a giant air filter for the city.
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