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Study concludes abundant shale gas is neither climate hero nor villain; need for targeted GHG reduction policy

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Shale gas in particular has grown rapidly, from less than one percent of US production in 2000 to 34% in 2012, and projections show strong production growth continuing for the foreseeable future. With this abundance of natural gas comes a variety of questions.

Climate 199
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IEA: improving efficiency of road-freight transport critical to reduce oil-demand growth; three areas of focus

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Improving the efficiency of road-freight transport is critical to reducing the growth in oil demand, carbon emissions and air pollution over the next decades, according to the International Energy Agency’s latest report, The Future of Trucks: Implications for energy and the environment. —“The Future of Trucks”.

Oil 150
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Black carbon is a much larger cause of climate change than previously assessed; about twice previous estimates, and 2/3 the effect of CO2

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Black carbon (BC) is the second largest man-made contributor to global warming and its influence on climate has been greatly underestimated, according to the first quantitative and comprehensive analysis of this pollutant’s climate impact. Emission rates of BC in the year 2000 by region, indicating major source categories in each region.

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Evidence from glacier ice: Until it was banned, leaded gasoline dominated the anthropogenic lead emissions in South America

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Leaded gasoline was a larger emission source of the toxic heavy metal lead than mining in South America, even though the extraction of metals from the region’s mines historically released huge quantities of lead into the environment, according to a study by researchers from the Paul Scherrer Institute PSI and the University of Bern.

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Shell updates energy scenarios; world entering an era of volatile transitions

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The new booklet— Signals & Signposts —updates the company’s thinking by taking into account the impact of the global economic and financial crisis. In summary, Shell believes that the world is entering an era of volatile transitions as the effects of energy consumption on the environment become increasingly clear.

Energy 256
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Study finds rising temperatures increase risk of unhealthy ozone levels absent sharp cuts in precursors

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Preliminary global mean CO 2 concentrations in February 2014 were 398.06 These gases come from human activities such as combustion of coal and oil as well as natural sources such as emissions from plants. Predicted changes in regional climate and globally enhanced ozone are estimated to increase surface ozone over most of the U.S.;

Ozone 199
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Final session on international mercury convention this week expected to culminate in agreement; UNEP Global Mercury Assessment 2013 finds industrial source Hg emissions may be rising

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Unintentional emission sectors: Coal burning, ferrous- and non-ferrous (Au, Cu, Hg, Pb, Zn) metal production, cement production. UNEP produced its first Global Mercury Assessment in 2002 and a subsequent study in 2007. These global percentages will, of course, vary on a regional basis. Source: UNEP. Click to enlarge.

Mercury 262