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California ARB: GHG emissions fell below 1990 levels for first time in 2016; down 13% from 2004 peak; transportation emissions up 2%

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The California Air Resources Board (CARB) announced that greenhouse gas emissions in California in 2016 fell below 1990 levels for the first time since emissions peaked in 2004—a reduction roughly equivalent to taking 12 million cars off the road or saving 6 billion gallons of gasoline a year. How the inventory is compiled.

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Study Concludes Warming Climate Will Increase Ozone Levels in Major California Air Basins; Climate Change and Regional Air Quality Are Intertwined Problems

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Illustration of projected ozone changes in the South Coast region due to climate change in 2050. The study also predicts that peak concentrations of dangerous airborne particles will increase in the San Joaquin Valley due to the effects of climate change on wind patterns. Click to enlarge. Kleeman, Ph.D.

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Study finds 12-30% fuel consumption gap between certified and real-world use in China

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Since carbon dioxide emissions are highly correlated with fuel consumption (FC), fuel consumption regulation is a useful policy instrument to combat climate change. —Dror et al. 2018.12.039.

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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. The developing and least-developed economies, 80% of the world’s population, accounted for 73% of the global growth of emissions in 2004. Climate Change Science Compendium 2009. Tags: Climate Change. Click to enlarge.

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New phase of globalization could undermine efforts to reduce CO2 emissions

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It found that trade among developing nations—South-South trade—more than doubled between 2004 and 2011. —Dabo Guan, professor in climate change economics at UEA’s School of International Development and co-author on both studies. Gt in 2004 and 2.2 Gt in 2004 to 1.1 Gt in 2004 and 2.2

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UCR study finds ultra-low emission natural gas bus exceeds federal and state NOx standards; as low as 0.0007g/bhp-hr

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In both cases, the NO x emissions were surprisingly low and 99% cleaner than the current standard and 99.96% cleaner than the 2004 standard. The engine tested below the California Air Resources Board voluntary limit of 0.02g/bhp-hr. This is the only engine to meet the California standard.

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Researchers Predict Permafrost Thaw Will Intensify Climate Change More Quickly Than Previously Thought; Melting of Greenland Icesheet Could Drive More Water Than Previously Thought to North American Northeast

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An understanding of the rate of carbon release is necessary to estimate the strength of positive feedback to climate change, a likely consequence of permafrost thaw. Aixue Hu, Gerald Meehl, Weiqing Han, and Jianjun Yin (2009) Transient Response of the MOC and Climate to Potential Melting of the Greenland Ice Sheet in the 21 st Century.