Green Car Congress
MAY 12, 2020
Levels of two major air pollutants have been reduced significantly since lockdowns began in response to the COVID-19 pandemic, but a secondary pollutant—ground-level ozone—has increased in China, according to new research. For comparison, columns over the same time periods are shown for 2019. —Guy Brasseur.
Green Car Congress
OCTOBER 7, 2019
related damages, researchers from Carnegie Mellon University and Stanford have found that, US-economy-wide, gross external damage (GED) due to premature mortality has decreased by more than 20% from 2008 to 2014. GED was calculated for the 3 most recent NEI years: 2008, 2011, and 2014. In a new study of PM 2.5 Tschofen et al.
Green Car Congress
MAY 29, 2014
Jakober, 2008). However, the use of CFT resulted in a remarkable reduction in carbonyl emissions in comparison with using DF. lower ozone formation potential of the carbonyl compounds present than DF under the identical operating conditions. Kleeman (2008) “Carbonyl Emissions from Gasoline and Diesel Motor Vehicles,”.
Green Car Congress
AUGUST 9, 2012
VOCs, primarily emitted from the tailpipes of vehicles, are a key ingredient in the formation of ground-level ozone which, at high levels, can harm people’s lungs and damage crops and other plants. —lead author Carsten Warneke, Ph.D.,
Green Car Congress
OCTOBER 30, 2009
Despite their limitations, GWPs are widely used for comparison among long-lived gases, forming the basis for worldwide political agreements on climate and carbon trading. Because the latter was a $126 billion/year market in 2008, even small differences in GWPs can have large economic consequences. —Drew Shindell.
Green Car Congress
AUGUST 28, 2009
Comparison of annual N 2 O ODP-weighted emissions from the 1990s with emissions of other ODS in 1987 and in 2008. Currently, anthropogenic N 2 O emissions represent the largest contribution to ozone depletion. Even at the height of ODS emissions in the 1980s, annual anthropogenic N 2 O emissions were the fourth most significant.
Green Car Congress
AUGUST 30, 2009
80.27, “high ozone season” means the period from June 1 to September 15 of any calendar year and “regulatory control period” means the period from May 1 to September 15 of any calendar year. Current Legal Requirement for Use of Anhydrous Ethanol in the United States. 40 CFR § 80.27 addresses controls and prohibitions on gasoline volatility.
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