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Reducing Black Carbon Emissions and Ground-Level Ozone Would Provide Immediate Benefit Against Climate Change

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Reducing emissions of black carbon soot and ground-level ozone would quickly make a considerable dent in the climate change problem and would also contribute to public health and protect crop yields, according to an essay in the September/October issue of Foreign Affairs. Besides a danger to breathe, ozone lowers crop yields.

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Latest GHG Inventory shows California remains below 2020 emissions target; much steeper rate of GHG reductions required

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in 2018 (2000-2018 average year-over-year increase is 6.8%), continuing the increasing trend as they replace Ozone Depleting Substances (ODS) being phased out under the 1987 Montreal Protocol. Industry is already increasing the use of alternatives to petroleum diesel, including renewable diesel and biodiesel.

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California 2017 GHG inventory shows 1.2% total drop from 2016; transportation sector emissions up 1%

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Changes in emissions by Scoping Plan sector between 2000 and 2017. Biofuels such as ethanol, biodiesel, and renewable diesel can displace fossil fuels and reduce the amount of fossil-based CO 2 emissions released into the atmosphere. Compared to 2016, California’s GDP grew 3.6% Trends in California GHG Emissions. Source: ARB.

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

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HFCs are powerful greenhouse gases originally developed as substitutes for ozone-depleting chemicals. By 2050, HFC emissions could equal up to 19% of global CO 2 emissions under business-as-usual scenarios. From Molina et al. 2009), reproduced from Ramanathan and Feng (2008) Click to enlarge. Earlier post.) Mario Molina. (Dr.

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California Air Resources Board posts revised draft of strategy to reduce “Super Pollutants”

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SLCPs are a category of pollutants which remain in the atmosphere for a relatively brief period, but have global warming potentials that are much higher than those of CO 2. SLCPs may account for an estimated 40% of global warming, increasing the impacts of climate change. CO 2 remains in the atmosphere for up to a century.

Pollution 150
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GISS study finds applying stricter non-CO2 vehicle emission standards worldwide would yield climate benefits in addition to major health and agricultural benefits

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Global and regional zonal mean temperature changes relative to 2010 due to non-CO 2. used global composition-climate modelling to examine the integrated impacts of adopting stringent European on-road vehicle-emission standards for non-CO 2 pollutants in 2015 in many developing countries. Climate response to non-CO 2 vehicle emissions.

Climate 231
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UNEP Report Calls for More Sophisticated Approach to Developing Biofuels; Limitations of Current LCA Studies

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Here, RME show advantages for primary energy and GHG, but disadvantages in terms of acidification, eutrophication and ozone depletion. World ethanol production for transport fuel tripled between 2000 and 2007 from 17 billion to more than 52 billion liters (13.7 Improving global land use. Source: “Assessing Biofuels”.

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