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USDA study finds GHG from corn-based ethanol ~39% to 43% lower than from gasoline; reduction of >70% possible by 2022

Green Car Congress

A new study released by the US Department of Agriculture (USDA) finds greenhouse gas emissions from corn-based ethanol are about 39% lower than gasoline. The study also states that when ethanol is refined at natural gas-powered refineries, the greenhouse gas emissions are even lower—around 43% below gasoline. Searchinger et al.

Gasoline 255
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Final EPA report shows total US GHG emissions up 3.2% in 2010, total CO2 up 3.5%, total transportation CO2 up 1%

Green Car Congress

The final report shows overall emissions in 2010 increased by 3.2% EPA attributes the trend to an increase in energy consumption across all economic sectors, due to increasing energy demand associated with an expanding economy, and increased demand for electricity for air conditioning due to warmer summer weather during 2010.

2010 252
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EIA Estimates 2.1% Growth in Fossil Fuel CO2 Emissions in US in 2010; Still Below 1999-2008 Levels

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The US Energy Information Administration (EIA) estimates in the April 2010 release of its Short-Term Energy and Summer Fuels Outlook that CO 2 emissions from fossil fuels, which declined by 6.6% in 2010 and 1.1% million barrels per day (bbl/d) in 2010 and 1.6 in 2010 and to $2.96 in 2009, will increase by 2.1%

2008 186
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Environment Canada/MECA team assesses black carbon emissions in GDI engine exhaust; evaluation of prototype gasoline particulate filter

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Although gasoline direct injection engines (GDI) are a favorable technology for reducing fuel consumption and greenhouse gas emissions, recent studies have shown that GDI vehicles could emit more PM than traditional PFI (gasoline port fuel injection) vehicles as well as heavy-duty diesel trucks equipped with diesel particulate filters.

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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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Researchers from the University of Minnesota have produced a spatially and temporally explicit life cycle inventory (LCI) of air pollutants from gasoline, ethanol derived from corn grain, and ethanol from corn stover for the contiguous US (the lower 48 states). Efficiencies and emissions factors reported are for year 2010.

Gasoline 236
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EIA Projects 5% Decrease in Fossil-Fuel-Based CO2 Emissions in 2009; Little Change in Emissions from Gasoline

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Although little change in CO 2 emissions from motor gasoline is expected in 2009, CO 2 emissions from other transportation petroleum fuels, particularly jet fuel (a 9.8% Although little change in CO 2 emissions from motor gasoline is expected in 2009, CO 2 emissions from other transportation petroleum fuels, particularly jet fuel (a 9.8%

2009 220
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EIA: US energy-related CO2 fell by 2.8% in 2019, slightly below 2017 levels

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The increase in 2018 was largely caused by increased energy use as a result of weather and was the largest increase in CO 2 emissions since 2010, when the US economy was recovering from an economic recession. The United States now emits less CO 2 from coal than from motor gasoline.

2019 273