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Read more about UN health agency sets higher, tougher bar for air quality
UN health agency sets higher, tougher bar for air quality

By JAMEY KEATEN and DREW COSTLEY, Associated Press GENEVA (AP) — The harmful health effects of air pollution kick in at lower levels than previously thought, the World Health Organization said Wednesday as it set a new standard for policymakers and the public in the first update of its air quality guidelines in 15 years. The U.N. health agency released its revised guidance as climate change is a leading

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