Hong Kong Tatler - - Features -

The US$10 bil­lion that Beijing spent clean­ing up be­fore the 2008 Olympics—which in­cluded mov­ing dirty in­dus­try, re­duc­ing traf­fic and tight­en­ing emis­sion stan­dards—re­sulted in a 30 per cent im­prove­ment in air qual­ity com­pared to a year ear­lier, ac­cord­ing to a study by the Na­tional Bureau of Eco­nomic Re­search. Sadly, air qual­ity slumped to pre- Olympic lev­els shortly after the con­clu­sion of the Games.

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