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Improved air quality during Beijing Olympics could inform pollution-curbing policies
Date:7/24/2009

y harmful to the lungs, but are also known to be a global warming compound, Zhang said.

The researchers found that car emissions of black carbon were down 33 percent in 2008 compared with their 2007 readings. Carbon dioxide decreased 47 percent, and ultrafine carbon-based particles those that measure less than 100 nanometers decreased 78 percent.

The sharp drops were most likely due to a new emission standard implemented in Beijing in 2008, in which all new registered vehicles as well as gasoline and diesel fuel engines were required to achieve emissions standards equivalent to European Union regulations. A similar standard was mandated starting in June 2008 for 20,000 buses and 66,000 taxies. The improved fuel quality probably enhanced the performance of engines and catalytic converters, the researchers reported.

"We are showing what the city can do if they are determined to improve air quality," Zhang said.


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Contact: Blaine Friedlander
bpf2@cornell.edu
607-254-8093
Cornell University
Source:Eurekalert

Page: 1 2

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