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UN Review of Recent Climate Research Concludes That Impacts Of Climate Change Coming Faster Than Anticipated

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Significant climate anomalies 2008/2009. Source: Climate Change Compendium. degrees Celsius—even if GHG concentrations had been fixed at their 2005 concentration levels and without any other anthropogenic forcing such as the cooling effect of aerosols. Click to enlarge. Earlier post.). Earlier post.).

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Cutting Non-CO2 Pollutants Can Delay Abrupt Climate Change; The Fast Action Climate Agenda

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Probability distribution for the committed warming by GHGs between 1750 and 2005. Cutting HFCs, black carbon, tropospheric ozone, and methane can buy us about 40 years before we approach the dangerous threshold of 2°C warming. HFCs are powerful greenhouse gases originally developed as substitutes for ozone-depleting chemicals.

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National Academies Report Examines Hidden Cost of Energy Production and Use in US; Estimates $120B in 2005

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Health and other non-climate damages by life-cycle component for different combinations of fuels and light-duty automobiles in 2005 (top) and 2030 (bottom). GHG emissions (grams CO 2 -eq)/VMT by life-cycle component for different combinations of fuels and light-duty automobiles in 2005 (top) and 2030 (bottom). Click to enlarge.

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Study finds that under business-as-usual scenario, average global air quality to worsen; China, North India and Middle East are the hot spots

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Following this BAU scenario, the researchers projected that air quality for the global average citizen in 2050 would be almost comparable to that for the average citizen in East Asia in the year 2005—an outcome which underscores the need to pursue emission reductions, according to the authors.

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US Climate Action Report to UN Projects 4% Growth in Total US GHG Emissions to 2020

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From 2005 through 2020, total US greenhouse gas (GHG) emissions are projected to rise by 4% under a “with measures” scenario (but without a cap-and-trade program and other complementary policies), from 7,109 Tg CO 2 Eq. from 2005 to 2020. The United States released previous Climate Action Reports in 1994, 1997, 2002, and 2006.

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Study finds that environmental impact of corn-ethanol E85 is 23% to 33% higher than that of gasoline; environmental problem-shifting

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eutrophication; ET = ecological toxicity; FEC = fossil energy consumption; WU = water use; LO = land occupation; “The rest” includes acidification; smog formation; ozone layer depletion; and human health effects. GW = global warming; Eut. Credit: ACS, Yang et al. Click to enlarge. Credit: ACS, Yang et al. Click to enlarge.

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EPA report to Congress finds a strong scientific and technical foundation for mitigating black carbon emissions

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The US Environmental Protection Agency (EPA) has submitted its final Report to Congress on Black Carbon , in response to an October 2009 request from Congress to advance efforts to understand the role of black carbon (BC) in climate change. emissions in 2005. Earlier post.). Source: EPA.

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