Green Car Congress
AUGUST 15, 2019
Long-term exposure to ambient air pollutants, especially O 3 (ozone), is significantly associated with increasing emphysema, according to a new study led by the University of Washington, Columbia University and the University at Buffalo. The annual averages of ozone levels in study areas were between about 10 and 25 ppb.
Green Car Congress
MARCH 11, 2013
Researchers from Rice University and the US Environmental Protection Agency (EPA) report in a paper in the journal Atmospheric Chemistry that particularly in Northeastern cities, ozone levels dropped even beyond what was anticipated by cutting emissions of NO x from 2002 to 2006. from 2002 to 2006. Earlier post.).
Green Car Congress
SEPTEMBER 9, 2011
US EPA Region 9 8-hour ozone trends, 1979-2000. These State Implementation Plans (SIPs) are the roadmaps to meeting the 1997 8-hour ozone National Ambient Air Quality Standards (NAAQS) of 0.08 In 1997, EPA first established the 8-hour ozone standard, which replaced the older 1-hour ozone standard (0.12 Source: EPA.
Green Car Congress
OCTOBER 17, 2013
Despite a decline in emissions of the main air pollutants in Europe in the period 2002–2011, around 90% of city dwellers in the European Union (EU) are exposed to PM 2.5 Lower proportions of EU citizens were exposed to levels of these pollutants exceeding the limits or targets set out in EU legislation.
Green Car Congress
AUGUST 9, 2012
A scatter plot of CO, as a tracer for pollution, versus CO 2 , as a tracer for the amount of combustion, for 2002 and 2010. Even though the CO 2 enhancements over background were comparable in the two years, about 25 ppm in 2002 and 35 ppm in 2010, the ?CO/?CO2 CO2 ratio for this flight track segment decreased from 24.5
Green Car Congress
MAY 20, 2010
The program is geared to help small California-based fleets replace their older, polluting trucks with newer, cleaner models. Previously, the maximum amount of a voucher was $35,000; Trucks with 2002 and older engines may qualify for a newer truck.
Green Car Congress
MAY 18, 2009
Jacobson first showed in 2000 that black carbon was the second-leading cause of global warming after carbon dioxide in terms of radiative forcing and, in 2002, that its control was the most effective method of slowing warming. Further, controlling soot will significantly reduce particulate air pollution deaths. Earlier post.).
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