02 Sep '11, 3pm

Why #ozone smog pollution standards matter: national asthma rates are rising again, esp among children.

Why #ozone smog pollution standards matter: national asthma rates are rising again, esp among children.

Sneezing and Wheezing: How Global Warming Could Increase Ragweed Allergies, Air Pollution, and Asthma , pages 14-16 describe the methodology by which we created the online air pollution map on our pages. "Unhealthy ozone days" are those sites where at least one day per summer, on average, did not meet the US EPA's health-based standard for ground-level ozone smog, in the five study years from 2002-2006. The presence of ragweed in an area can mean allergenic pollen is also being produced in late summer and into autumn, which is often the same time that ozone smog is at its worst, posing a "double-whammy" to health for people with allergies and asthma.

Full article: http://www.nrdc.org/health/climate/airpollution.asp

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