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Daimler has long believed hydrogen will be the fuel of the future, and today it joined Ford in making a $228 million bet that it will be right.

UN chief Ban Ki-moon urged swift action on global warming on the eve of a visit Friday to

Oil leaking from a cargo ship that struck the San Francisco-Oakland Bay Bridge has spread throughout the bay and is threatening a majestic stretch of the California coastline, the Coast Guard said Thursday.

More than 100 mayors from across the United States convened in Seattle, Washington this week to discuss how cities can play a role in fighting global warming. As Amy Bickers reports from Seattle, the participants at the U.S. Conference of Mayors' Climate Protection Summit compared ways to slash carbon emissions while creating jobs and boosting urban economies.

Fortune partnered with AccountAbility and CSRnetwork to rank the world's 100 largest corporations by the quality of their commitment to social and environmental goals.

Since he was a teenager, Takeshi Uchiyamada's dream was to make a car. But as he entered his 50s as a Toyota engineer, he had all but given up hope he would ever head a project to develop a model.

In the hypercompetitive world of Formula 1 motor racing, the only thing greater than the level of technology is the money spent developing it, and a lot of that money is about to be invested in green technology that will appear in cars the rest of us drive.

Malaysia, Thailand, Colombia, Uruguay and Ghana are poised to become the world leaders in biodiesel production, according to a new study.

Energy Star 4.0-rated products can lower your energy bill and reduce the amount of pollutants in the world--but by somewhat less than you might hope.

Sun, wind, water — all great, renewable sources of energy. People? Well, they're constantly on the move, but much of that kinetic energy goes to waste. Now a few enterprising engineers are looking to convert our restlessness into electricity. It's not the Matrix — people don't make enough juice to attract hungry AIs — but it's enough to spark these experiments.

The Equinox fuel cell cars run solely on hydrogen, which, at this point in time, is a drawback for the average consumer. Although we produce 40 billion kilograms of hydrogen globally every year--enough to power 130 million fuel cell-powered cars--hydrogen fueling stations are still scarce.

A wind farm in Northamptonshire. Photograph: David Sillitoe

Ministers are planning a U-turn on Britain's pledges to combat climate change that "effectively abolishes" its targets to rapidly expand the use of renewable energy sources such as wind and solar power.

The wealth of a nation is its people, its cultural heritage, its environment and its natural resources. Obviously, this is not the case.

"They could do all this stuff if they wanted to. ... The technology has been there forever. They make 90% of the components I use... I've just been messing around and seeing what I can do. ... Everybody should be driving a plug-in vehicle right now. ... I can go next door to Ace Hardware and buy a DC electric motor, go out to my four-wheel-drive truck, remove the transmission and engine, bolt the electric motor onto the back of the transfer case, put a series of lead-acid batteries up to 240 volts in the back of the bed, and we're good to go.

"Americans can make a difference in the fate of the penguin population by leaving the car at home and taking a motorcoach," Pantuso said. "Motorcoaches reduce congestion and pollution by taking more than 425 million cars off the road each year. Coaches provide the same congestion mitigation benefits as transit buses in that we have the capacity to take up to 55 cars, per coach, off the road at one time."