Twenty-three different groups want the government take more time to study the issue.

One side says the EPA is overstepping its bounds, while some say it didn't go far enough.

The EPA has moved one step closer to allowing a higher blend of alternative fuel in your cars, but the usual suspects aren't on board.

In these budget-cutting times, biofuels may be on the chopping block. And with a presidential election looming, politics will play role.

Ethanol is emerging as one of the biggest wedge issues for Republicans as they focus on the Iowa caucus.

The latest assault on ethanol subsidies comes from one of the nation's leading newspapers.

In an attempt to appease Iowa corn farmers, the sometime-frontrunner mires himself in controversy.

Probably not, but one enthusiast is organizing a petition to make the social networking site consider the idea.

Actress will front marketing campaign targeted at getting more involved in turning off the lights on March 26th.

Get daily reminders about your carbon footprint and IE will plant a tree of your choice.

Tree-friendly book lovers rejoice by planting trees for each book read.

Kenaf, the carbon-sequestering monster plant, provides food, shelter and carbon credits.

MNN rounds up some of the Web's most useful tools for shrinking your footprint.

With so much activism and celebrating going down on Earth Day, a sense of humor is often overlooked. The Onion is here to help.

Two fair trade pioneers get into the carbon market.

Maybe carbon offsetting isn't as fool-proofed as many businesses would like people to believe.

As demand for carbon accounting heats up, start-up software companies vie for the lead position. Over 50 new companies (and counting) have entered the race.

Brown has gone green! UPS has become the first small package carrier to offer its customers the option of purchasing carbon offsets to counteract the CO2 emissi

Green Shipping lets businesses and individuals measure and offset the CO2 emissions of packages when using UPS, FedEx or the U.S. Postal Service.

Donations from Milliken & Company and WindCurrent will allow Greenbuild 2009 to be a carbon-neutral conference.

An ethical travel operator in Britain denounces carbon offsetting, but are ‘holidays closer to home’ a real solution?

Travel company cancels offset program citing its inability to reduce global emissions.

Power Trip is a fascinating journey through our incredibly complex relationship with oil, energy and everything in between.

European carbon market comes to a screeching halt after hackers use a phishing scheme to steal $4 million in emissions credits.

More than 1,000 workers will study the environmental effects of energy production.

This month, scientists and tree lovers celebrate the 2nd birthday of a hybrid chestnut tree that may be a force in reducing the impacts of climate change.

Honor your favorite boss on this holiday, which falls on Saturday, Oct. 16, 2010.

Matt Hickman unravels the mysteries behind offsetting CO2 and buying RECs. (Hint: One of them can fund tree-planting efforts.)

Buy a ticket for your chance to winning millions while fighting climate change.

COTAP will focus its carbon offsetting projects in impoverished countries.

Polio could be wiped out by 2018, but Gates says it will require investment and hard work.

Your car could capture and store carbon dioxide for later disposal, making it zero climate emission even without batteries.

Mary Barra is a GM insider, but she's also a change agent who will continue the company's aggressive comeback.

Traffic driving you crazy? Let MNN get you on track to a more astute commute with these carpooling and public transit tips.

My new bike has a lithium-charged motor that kicks in just enough added oomp to power me through hills and headwinds.

Video: Sabrina Bryan and Robbie Amell give you their eco-tips.

Car-sharing service Zipcar is betting that name recognition will boost sales of its common stock in an upcoming initial public offering.

Officially called the "3D fast bus," the bus will literally straddle the road and carry passengers over cars and under overpasses.

Car sharing service Zipcar will be adding Toyota Prius plug-in hybrids to its fleet.

If a celebrity endorsement gets kids using a phone app that prevents on-the-road texting, emailing and phone use, who am I to complain? But, for the record, Jus

Driving with a burger in one hand and a cellphone in the other is a sure recipe for highway disaster. And all that old food is hanging out, just waiting to give

A 10-mile stretch of Los Angeles' 405 Freeway — the most heavily trafficked road in the country — was completely shut down this weekend as part of a $1 bill

Apply to the 30-Day Electric Bike Challenge and you could be selected to receive an e-bike for a month in exchange for swearing off the use of your car.

Enterprise is expanding its carsharing services despite a company executive’s dismissal of the need for a separate carsharing industry.

Bicycle sales exceed cars in Europe, and there's compelling evidence that pedaling increases the national happiness quotient.

Studies show that drivers older than 85 get into fatal accidents almost 4 times as often as teens do, and intersections are a problem.

Two new studies decipher who prefers which kind of car, revealing unexpected attitudes that challenge many assumptions.

Which form of travel gives off the fewest emissions? Let's just say it pays to carpool.

Public transit has long been undervalued as a mobility option. Thanks to new technologies and new ways of living, that's changing.

Helsinki is experimenting with a plan to match people with rides, making cars unnecessary.