article thumbnail

EPA proposes approval of new ozone plans for the two of the worst Air Quality Zones in US: California’s San Joaquin Valley and South Coast

Green Car Congress

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.

Ozone 236
article thumbnail

Study associates long-term exposure to air pollution with increasing emphysema

Green Car Congress

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.

Pollution 223
article thumbnail

California 2017 GHG inventory shows 1.2% total drop from 2016; transportation sector emissions up 1%

Green Car Congress

Changes in emissions by Scoping Plan sector between 2000 and 2017. Emissions from transportation sources were relatively constant from 2002 through 2007, declined through 2013, then increased by 9.0 Compared to 2016, California’s GDP grew 3.6% while the carbon intensity of its economy declined by 4.5%. Source: ARB. Source: ARB.

2017 230
article thumbnail

Stanford Professor Urges EPA to Include Black Carbon in Endangerment Finding

Green Car Congress

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. F, with about 40% due to ozone. Earlier post.). These additional deaths are occurring today ,” he said.

Carbon 150