- Bad air days on the rise: The nation’s most polluted city is … USA TODAY
- DC, nearby counties receive failing grade for healthy air WTOP
- After years of progress, the number of Americans breathing polluted air is rising, report says CNN
- Millions more Americans breathing dirty air as planet warms – report The Guardian
- View full coverage on Google News
Source: Google News | Bad air days on the rise: The nation's most polluted city is … – USA TODAY
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