The climate benefits of biofuels such as ethanol and biodiesel have been debated for many years. Attempts to compare these fuels with one another and fossil-derived fuels such as gasoline and diesel confront many uncertainties, not all of which can be resolved through further data analysis. By scrutinizing the greatest sources of uncertainty and grounding analysis in the areas of high certainty such as combustion chemistry and the terrestrial carbon cycle, this paper sheds light on this challenging subject and points the way toward new strategies for addressing CO2 emissions from transportation fuels.
A new report from a University of Michigan researcher estimates that, even without going electric, U.S. cars and trucks could achieve an average efficiency of 74 miles per gallon by 2035. Compared to a federal 2005 Corporate Average Fuel Economy (CAFE) baseline, that’s a tripling of fuel economy.
Since 2005, the United States has embarked on a steady expansion of renewable fuels such as ethanol and biodiesel, widely touted as a win-win proposition for energy security and the environment. However, the promised breakthroughs in biofuel technology have greatly lagged the rapid ramp-up of production mandated by Congress while adverse side effects of the policy have become ever more clear.
More and more plug-in electric vehicles are hitting the roads each year, but is the technology really close to a tipping point for mass-market growth? In this analysis piece for the Society of Automotive Engineers (SAE), U-M Energy Institute research professor John DeCicco argues that the real turning point for EVs will come only after transportation systems are automated for driverless operation. Read the article here at Automotive Engineering International Online.
A collaboration between the University of Michigan Energy Institute (UMEI) and Institute for Social Research (ISR), the U-M Energy Survey provides a ongoing, rigorously designed and nationally representative survey of Americans' attitudes about energy. As a quarterly rider appended to ISR’s world-renowned Surveys of Consumers Attitudes (SCA), the survey is designed to elicit consumer perceptions of the affordability, reliability and environmental impacts of energy.