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Clean air group says Denver, Fort Collins improving on ozone


April 21, 2017

DENVER (AP) — Ozone pollution has improved in Denver and Fort Collins, but both cities remain among the 15 worst in the nation, the American Lung Association said.

Denver had the 11th-worst ozone levels and Fort Collins had the 15th-worst, the association said in its 2017 clean air report released late Tuesday.

Last year, Denver was eighth and Fort Collins 10th.

Ozone can be harmful to people with respiratory problems and other vulnerable groups, including children and the elderly. People who are active outdoors can also suffer.

The report gave 12 Colorado counties a grade of D or F for t...

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