Ethanol and Coal

03 August 2007

I normally don't care for commentary from Rolling Stone magazine, but this recent article about corn-based ethanol was actually quite interesting.

On whether it will replace fossil fuels:

"The most seductive myth about ethanol is that it will free us from our dependence on foreign oil. But even if ethanol producers manage to hit the mandate of 36 billion gallons of ethanol by 2022, that will replace a paltry 1.5 million barrels of oil per day -- only seven percent of current oil needs. Even if the entire U.S. corn crop were used to make ethanol, the fuel would replace only twelve percent of current gasoline use."

On whether it will reduce greenhouse gas emissions:
"Another misconception is that ethanol is green. In fact, corn production depends on huge amounts of fossil fuel -- not just the diesel needed to plow fields and transport crops, but also the vast quantities of natural gas used to produce fertilizers. Runoff from industrial-scale cornfields also silts up the Mississippi River and creates a vast dead zone in the Gulf of Mexico every summer. What's more, when corn ethanol is burned in vehicles, it is as dirty as conventional gasoline and does little to solve global warming: E85 reduces carbon dioxide emissions by a modest fifteen percent at best, while fueling the destruction of tropical forests."

The effects on the food market:
"But the biggest problem with ethanol is that it steals vast swaths of land that might be better used for growing food. In a recent article in Foreign Affairs titled "How Biofuels Could Starve the Poor," University of Minnesota economists C. Ford Runge and Benjamin Senauer point out that filling the gas tank of an SUV with pure ethanol requires more than 450 pounds of corn -- roughly enough calories to feed one person for a year."

Also, Coal:

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