Remove 2002 Remove Emissions Remove Ozone
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Rice/EPA study finds ground-level ozone falling faster than CMAQ model predicted

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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.).

Ozone 218
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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

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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
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Study finds rising emissions of ozone-depleting CFC-11, banned by Montreal Protocol

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Emissions of one of the chemicals most responsible for the Antarctic ozone hole are on the rise, despite an international treaty that required an end to its production in 2010, a new study by researchers at NOAA and their colleagues shows. However, that decrease is significantly slower than it would be without the new CFC emissions.

Ozone 170
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NOAA, partners find about 98% decline in VOCs concentrations in LA Basin over last 50 years despite 3x increase in use of gasoline and diesel

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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

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Upwards of 90% of EU city dwellers exposed to PM2.5 and O3 pollution at levels deemed harmful by WHO

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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 Despite the overall decline in emissions, certain individual sectors have seen emissions of some pollutants increase during this period, the report found.

Pollution 223
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California 2017 GHG inventory shows 1.2% total drop from 2016; transportation sector emissions up 1%

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The California Air Resources Board’s latest state inventory of greenhouse gas emissions shows that California’s GHG emissions continue to decrease. Trends in California GHG Emissions. Changes in emissions by Scoping Plan sector between 2000 and 2017. Emissions are organized by the categories in the AB 32 Scoping Plan.

2017 230
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Comparative study finds that B20 increases emission rates of a number of pollutants in both light- and medium-duty diesel engines at idle

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Emission rates for the 1.7 A new study led by researchers at the University of Michigan compared regulated and unregulated emissions from both light-duty passenger car (1.7 L/2002 calibration and 6.4 L/2002 calibration and 6.4 Unregulated pollutants also include ozone precursors and bioaccumulative and toxic compounds.

Pollution 231