US smog Made In China by piratenews

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US smog Made In China

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UPDATED: Thursday, January 21, 2010 23:34
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Thursday, January 21, 2010 11:34 PM

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Al Gore and UN exempt China from Global Warming Fart Tax

Smog in the Western U.S.: Blame China?

Ozone from Asia is wafting across the Pacific on springtime winds and boosting the amount of the smog-producing chemical found in the skies above the Western United States, researchers said in a study released Wednesday.

The study, published in the journal Nature, probes a phenomenon that has puzzled scientists in the last decade: Ground-level ozone has dropped in cities thanks to tighter pollution controls, but it has risen in rural areas in the Western U.S., where there is little industry or automobile traffic.

The study, led by Owen R. Cooper, an atmospheric scientist at the University of Colorado, examined nearly 100,000 observations in the free troposphere — the region two to five miles above ground — gathered from aircraft, balloons and ground-based lasers.

It found that baseline ozone — the amount of gas not produced by local vehicles and industries — has increased in springtime months by 29% since 1984. The study has important implications both for the curbing of conventional pollution that damages human health and for controls on greenhouse gases that are changing the planet’s climate, experts said.

Ozone is not the only substance that crosses borders. Last year, a study by the National Research Council found that “significant concentrations” of three other types of air pollutants are also transported across the Northern Hemisphere: particulate matter such as dust, sulfates or soot; mercury; and persistent organic pollutants such as DDT. Emissions of nitrogen oxides, a key ingredient for ozone formation, have increased by more than 50% in China over the last decade while decreasing in the U.S. and Europe.

http://latimesblogs.latimes.com/greenspace/2010/01/ozone-smog-air-poll
ution-greenhouse-gases-china-pollution-owen-r-cooper-kathy-law.html

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