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International study identifies 14 key measures to reduce methane and black carbon emissions; reduction in projected global mean warming of ~0.5 °C by 2050

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Circle areas are proportional to values for (A and B) climate change, (C and D) human health (values for population over age 30), and (E and F) agriculture. Methane is both a potent greenhouse gas and an important precursor to ground-level ozone. National benefits of the CH 4 plus BC measures versus the reference scenario.

Carbon 257
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UMD-led study finds China’s SO2 emissions down 75% since 2007, India’s up 50%; India may now be the top SO2 emitter

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Two maps compare total annual sulfur dioxide amounts for India and China during 2005 (left) and 2016 based on Ozone Monitoring Instrument measurements. Illustration: Chris McLinden, Environment and Climate Change Canada. They also cannot account for changing conditions or unforeseen policies. Click to enlarge.

India 170
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Calif. ARB releases GHG scoping plan update; more ZEVs, “LEV IV”, MD and HD regulations; ZEV for trucks; more LCFS

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Many of the strategies employed to reduce GHG emissions will also work to meet the national ambient air quality standard for ozone in 2032. California’s vehicle GHG standards—authorized by AB 1493 (Pavley) in 2002, first approved in 2004, and extended in 2012—are delivering fuel consumption and CO 2 reductions.

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Study suggests cap and trade programs do not provide sufficient incentives for energy technology innovation; implications for climate policy

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Taylor 2012. Policies incentivizing the private sector to push to develop innovative “clean” technologies are likely to play a key role in achieving climate stabilization. Respectively, Title IV of the 1990 Clean Air Act and the Ozone Transport Commission/NO x Budget Program.). —Taylor 2012. Click to enlarge.

Climate 261
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Researchers describe the “where” and “when” of life cycle emissions from gasoline and ethanol in the US

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Life cycle inventories have typically been presented at global, national, or regional levels—sufficient for understanding global processes such as climate change and fossil fuel depletion, but insufficient for the analysis of local processes such as air pollution, according to the researchers. —Tessum et al. Christopher W.

Gasoline 236
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ARB releases proposed cap-and-trade regulation for comment; transportation fuels impacted in 2015

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Starting in 2012, the program will cover electricity generation, including imports, and large industrial sources and processes with annual GHG emissions at or above 25,000 MTCO 2 e. The initial cap level in 2012 will be set at the level of emissions expected in 2012 from sources covered at the start of the program.

2015 210
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EPA proposes new standards to reduce methane and VOCs emissions from oil and gas industry

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Sources already subject to the 2012 NSPS requirements for VOC reductions that also would be covered by the proposed 2015 methane requirements would not have to install additional controls, because the controls to reduce VOCs reduce both pollutants. EPA required green completions for hydraulically fractured natural gas wells in its 2012 rules.

EPA 150