For nearly 15 years the Chinese government has been talking about improving the air quality in Beijing, and by its own measures it seems to have done a pretty good job.
Since the city launched a campaign in 1998 to clean up the atmosphere, the number of “blue sky days” recorded by the government increased each year until 2011, when it achieved a record 286 days with supposedly clean air, compared with 100 in 1998.
But as anyone who has lived for long in Beijing can attest, “blue sky” is a somewhat redundant concept when applied to the celestial capital.
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