Carbon Cloud over a Green Fuel

[The Christian Science Monitor] Late last year in Goldfield, Iowa, a refinery began pumping out a stream of ethanol, which supporters call the clean, renewable fuel of the future. There’s just one twist: The plant is burning 300 tons of coal a day to turn corn into ethanol — the first US plant of its kind to use coal instead of cleaner natural gas. …At least three other such refineries are being built in Montana, North Dakota, and Minnesota. …Should coal become a standard for 30 to 40 ethanol plants under construction — and 150 others on the drawing boards — it would undermine the environmental reasoning for switching to ethanol in the first place, environmentalists say. …
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