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http://www.commondreams.org/headline/2011/06/03-7

Published on Friday, June 3, 2011 by USA Today

Study: Climate Change to Hike Ozone-Related Illnesses

by Wendy Koch

WASHINGTON - Left unchecked, climate change could increase breathing 
problems and health costs by exacerbating ground-level ozone, warns a 
report Thursday by the Union of Concerned Scientists.

Higher ozone levels could trigger 2.8 million additional serious 
respiratory illnesses and 944,000 extra missed school days in the 
United States in 2020 that could cost $5.4 billion, according to the 
peer-reviewed report by the Cambridge, Mass.-based environmental 
group.

"Even a small increase in ozone due to a warmer climate would have a 
significant impact on public health," said report co-author and UCS 
public health expert Liz Perera in announcing the findings. "It would 
mean more asthma attacks, respiratory illnesses, emergency room trips 
and premature deaths."

The most vulnerable U.S. states? The study used a mapping model by 
the Environmental Protection Agency to calculate national impacts and 
rank the 10 states most likely to be harmed in 2020.

In terms of costs, the research found that California would be hit 
hardest, followed by Texas, New York, Pennsylvania, Illinois, Ohio, 
Michigan, North Carolina, New Jersey and Virginia. It said these 
states have large numbers of urban residents, children and seniors as 
well as high levels of nitrogen oxides and VOC (volatile organic 
compound) emissions from vehicles and power plants.

Ground-level ozone, smog's primary component, is generated by the 
chemical reactions between nitrogen oxides and VOCs that come from 
heat and sunlight. Warmer average temperatures from a changing 
climate may boost ozone concentrations and stagnant air that can 
cause ozone pollution to settle over an area for a long time.

The study says EPA's Clean Air Act has reduced ozone-forming 
pollutants, but many counties and states are still unable to meet the 
federal ozone standard. EPA is expected soon to strengthen this 
standard, which is increasingly important since average U.S. 
temperatures have risen more than 2º Fahrenheit in the past century.

If global warming emissions continue to increase, the study estimates 
that average U.S. temperatures could rise 3º to 5.5º F by 2050 and 
result in about 11.8 million additional serious respiratory 
illnesses, 29,600 more infant and senior hospitalizations and 4.1 
million additional lost school days in 2050. Yet it says these health 
impacts could be cut about 70% if emissions decline and temperatures 
rise 2º to 4º F instead.

"The good news is we can address both ozone pollution and climate 
change by cutting fossil fuel emissions," Todd Sanford, a UCS climate 
scientist and report co-author, said in a statement.

© 2011 USA Today



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