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EPA says methane emissions from natural gas production have dropped 36% from 2007-2011

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In its recently released Inventory of US Greenhouse Gas Emissions and Sinks: 1990 – 2011 ( earlier post ), the US Environmental Protection Agency (EPA) reported that methane (CH 4 ) emissions from the field production of natural gas have declined by 36% from 2007 to 2011 (from 83.1 CH 4 emissions represented 8.8%

2007 285
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CRC ACES Phase 2 report finds emissions from modern heavy-duty diesels well below required levels

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2010 engines emissions reduction relative to 2010, 2007, and 2004 US emission standards. The study, the Phase 2 Report of the comprehensive Advanced Collaborative Emissions Study (ACES). The study, the Phase 2 Report of the comprehensive Advanced Collaborative Emissions Study (ACES). Source: CRC. Click to enlarge.

Diesel 296
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NOAA Study Identifies Nitrous Oxide as Top Ozone-Depleting Emission in 21st Century

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Comparison of annual N 2 O ODP-weighted emissions from the 1990s with emissions of other ODS in 1987 and in 2008. Even at the height of ODS emissions in the 1980s, annual anthropogenic N 2 O emissions were the fourth most significant. About one-third of global nitrous oxide emissions are from human activities.

Ozone 150
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Study quantifies impact of oil and gas emissions on Denver’s ozone problem

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The first peer-reviewed study to directly quantify how emissions from oil and natural gas (O&NG) activities influence summertime tropospheric ozone (O 3 ) pollution in the Colorado Front Range confirms that chemical vapors from oil and gas activities are a significant contributor to the region’s chronic ozone problem.

Ozone 150
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Emissions of Air Pollutants down in EU-27

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The European Community’s air pollutant emission inventory report released by the European Environment Agency finds that in 2007, sulphur oxides (SO x ) emissions were down by 72 % from 1990 levels. EU-27 emissions of all four pollutants were lower in 2007 than in 2006.

Pollution 236
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Study Finds Ozone Concentrations at Current Clean Air Standards Levels Can Impair Even Healthy Lungs

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Exposure to ozone at levels currently deemed safe by the NAAQS clean air standards can have a significant and negative effect on lung function, according to researchers at the University of California, Davis. The previous primary and secondary standards were identical 8-hour standards, set at 0.08 Earlier post.).

Ozone 186
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Study projects net cooling of climate from ship emissions through 2050

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This continued shorter-term cooling response caused by certain emissions does not negate the necessity for reductions in CO 2 emissions, which are crucial to limiting the long-term warming impact of the sector, the researchers cautioned. 1 from shipping in 2007, corresponding to 3.3% 1 of the total ship emissions in 2007.

Climate 240