Is Ethanol Really A Green Fuel?

Pete Letheby laments the path that ethanol production has taken in the U.S., arguing that it does not hold the promise of being the "green fuel" it was once thought to be.

1 minute read

May 18, 2006, 6:00 AM PDT

By Irvin Dawid


"Ethanol, as it is made from corn, isn't nearly the renewable fuel it's cracked up to be.

Because coal is cheaper, a new Iowa ethanol plant has chosen that fuel in the process rather than the cleaner natural gas. Similar plants are planned for North Dakota, Montana, Minnesota and perhaps Kansas. The problem, says the Natural Resources Defense Council, is that the carbon emissions alone from the coal plants will far outweigh any possible gains in using ethanol in our tanks.

Producing a gallon of corn ethanol needs 1,700 gallons of water to irrigate the corn and process the fuel, according to Cornell researcher David Pimentel, who's been lambasted by ethanol proponents because he says what they don't like to hear.

The Des Moines Register, in an enterprise story last fall, found that Iowa's ethanol plants have contaminated the state's air and water. A corn ethanol plant in Hastings, Neb., was cited for clean-air violations every year from 1995 to 2004. And some studies performed in California, where ethanol blends are required in the Sacramento and Los Angeles areas, show that the fuel increases harmful emissions."

Thanks to Patricia Matejcek via Sierra Club California Activist listserv

Friday, May 5, 2006 in The Denver Post

portrait of professional woman

I love the variety of courses, many practical, and all richly illustrated. They have inspired many ideas that I've applied in practice, and in my own teaching. Mary G., Urban Planner

I love the variety of courses, many practical, and all richly illustrated. They have inspired many ideas that I've applied in practice, and in my own teaching.

Mary G., Urban Planner

Cover CM Credits, Earn Certificates, Push Your Career Forward

Logo for Planetizen Federal Action Tracker with black and white image of U.S. Capitol with water ripple overlay.

Planetizen Federal Action Tracker

A weekly monitor of how Trump’s orders and actions are impacting planners and planning in America.

July 2, 2025 - Diana Ionescu

Aerial view of town of Wailuku in Maui, Hawaii with mountains in background against cloudy sunset sky.

Maui's Vacation Rental Debate Turns Ugly

Verbal attacks, misinformation campaigns and fistfights plague a high-stakes debate to convert thousands of vacation rentals into long-term housing.

July 1, 2025 - Honolulu Civil Beat

Person wearing mask walking through temporary outdoor dining setup lined with bistro lights at dusk in New York City.

Restaurant Patios Were a Pandemic Win — Why Were They so Hard to Keep?

Social distancing requirements and changes in travel patterns prompted cities to pilot new uses for street and sidewalk space. Then it got complicated.

June 19, 2025 - Diana Ionescu

Aerial view of new neifhborhood under construction with enpty lots in foreground.

In California Battle of Housing vs. Environment, Housing Just Won

A new state law significantly limits the power of CEQA, an environmental review law that served as a powerful tool for blocking new development.

July 2 - CALmatters

Low-rise Pearl Sreet mall in Boulfer, Colorado.

Boulder Eliminates Parking Minimums Citywide

Officials estimate the cost of building a single underground parking space at up to $100,000.

July 2 - Boulder Reporting Lab

Two-story buildings with porches in walkable Florida neighborhood.

Orange County, Florida Adopts Largest US “Sprawl Repair” Code

The ‘Orange Code’ seeks to rectify decades of sprawl-inducing, car-oriented development.

July 2 - CNU Public Square