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unhealthful day |
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unhealthful day Public health Any day in which the air quality for any of the 5 ambient air pollutants–carbon monoxide, nitrogen dioxide, ozone, particulate matter, sulfur dioxide exceeds an established air quality standard. Cf
Pollution Standards Index. Cf Unhealthy day. How to thank TFD for its existence? Tell a friend about us, add a link to this page, add the site to iGoogle, or visit webmaster's page for free fun content. |
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