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Old 04-07-2012, 03:13 AM
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Old 09-22-2021, 01:59 PM
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Default How much air pollution is too much? Global limits lowered for 6 pollutants
The World Health Organization said Wednesday that the harmful health effects of air pollution kick in at lower levels than it previously thought and it is setting a higher bar for policymakers and the public in its first update to its air quality guidelines in 15 years.


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