Hot summer days are getting hotter because of global warming, but that's not all. This 2004 NRDC report shows that higher temperatures would also mean more summertime smog. The report presents a comprehensive new analysis by medical experts at the Johns Hopkins University, Columbia University, University at Albany-SUNY, Yale University and University of Wisconsin-Madison. The analysis finds that people living in the eastern United States could see the average number of unhealthy air days during summer increase from 12 days to 20 days by the middle of the century. Pollen levels could also increase. Higher levels of smog and allergens would mean more asthma attacks, more hospitalizations, and more children told they can't play outdoors.

URL: http://www.nrdc.org/globalwarming/heatadvisory/contents.asp