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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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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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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. —NOAA scientist Stephen Montzka, lead author of the paper.

Ozone 170
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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 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

Pollution 223
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Maersk calls for EU enforcement of reefer legislation, pushes its Supotec foam

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Maersk Container Industry (MCI) is calling for tougher enforcement of European environmental legislation designed to protect the Earth’s ozone layer and help prevent climate change. Current EU legislation bans the “import” or “placing on the market” of reefer containers with significant potential to damage the climate and ozone layer.

Ozone 225
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PowerTrain to pay $2M penalty for selling nearly 80K engines that failed to meet Clean Air Act standards

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Between 2002 and 2008, PowerTrain imported 79,830 nonroad engines or pieces of equipment into the US that were not covered by a Clean Air Act-required certificate of conformity. Ground level ozone can trigger a variety of health problems, including chest pain, coughing, throat irritation and congestion. and Tool Mart, Inc.

Cleaning 186