Study Says Ethanol Not
Worth the Energy
July 18, 2005 — By Mark Johnson, Associated Press
ALBANY, N.Y. — Farmers, businesses
and state officials are investing millions of dollars in ethanol and
biofuel plants as renewable energy sources, but a new study says the
alternative fuels burn more energy than they produce.
Supporters of ethanol and other biofuels contend they burn cleaner than
fossil fuels, reduce U.S. dependence on oil and give farmers another
market to sell their produce.
But researchers at Cornell University and the University of
California-Berkeley say it takes 29 percent more fossil energy to turn
corn into ethanol than the amount of fuel the process produces. For
switch grass, a warm weather perennial grass found in the Great Plains
and eastern North America United States, it takes 45 percent more energy
and for wood, 57 percent.
It takes 27 percent more energy to turn soybeans into biodiesel fuel and
more than double the energy produced is needed to do the same to
sunflower plants, the study found.
"Ethanol production in the United States does not benefit the nation's
energy security, its agriculture, the economy, or the environment,"
according to the study by Cornell's David Pimentel and Berkeley's Tad
Patzek. They conclude the country would be better off investing in
solar, wind and hydrogen energy.
The researchers included such factors as the energy used in producing
the crop, costs that were not used in other studies that supported
ethanol production, said Pimentel.
The study also omitted $3 billion in state and federal government
subsidies that go toward ethanol production in the United States each
year, payments that mask the true costs, Pimentel said.
Ethanol is an additive blended with gasoline to reduce auto emissions
and increase gas' octane levels. Its use has grown rapidly since 2004,
when the federal government banned the use of the additive MTBE to
enhance the cleaner burning of fuel. About 3.6 billion gallons of
ethanol were produced last year in the United States, according to the
Renewable Fuels Association, an ethanol trade group.
The ethanol industry claims that using 8 billion gallons of ethanol a
year will allow refiners to use 2 billion fewer barrels of oil. The oil
industry disputes that, saying the ethanol mandate would have negligible
impact on oil imports.
Ethanol producers dispute Pimentel and Patzek's findings, saying the
data is outdated and doesn't take into account profits that offset
costs.
Michael Brower, director of community and government relations at SUNY's
College of Environmental Science and Forestry, points to reports by the
Energy and Agriculture departments that have shown the ethanol produced
delivers at least 60 percent more energy the amount used in production.
The college has worked extensively on producing ethanol from hardwood
trees.
Biodiesel can be used in any diesel engine with few or no modifications.
It is often blended with petroleum diesel to reduce the propensity to
gel in cold weather.
Source: Associated Press |