Climate change has been a significant factor in mass mammal extinction over most of the last fifty thousand years, according to an international team.
An MIT-led team has designed a green airplane for NASA that should use 70 percent less fuel than current planes while also reducing noise and nitrogen oxide emissions.
A report that Bill Gates plans to fund the world's largest geoengineering project to date has drawn fire from environmental groups.
It's always worth appealing to peoples' pockets if appealing to their better nature doesn't work, and a new UN report warns that the world's loss of biodiversity is threatening national economies.
Toyota reckons it can get the retail price of a hydrogen-fueled car below the $50,000 mark, and could launch as soon as 2015.
Russia and Italy have agreed to build a new fusion reactor outside Moscow that they hope could become the first to achieve ignition - the point where a fusion reaction becomes self-sustaining instead of requiring a constant input of energy.
More than 250 US scientists, including 11 Nobel laureates, have published an open letter defending climate change research.
Huge swathes of the world could become too hot for human beings to survive, if current worst-case scientific projections of global warming turn out to be true.
Google - one of the largest consumers of power in the world - is to invest for the first time in renewable energy with the purchase of a stake in two North Dakota wind farms.
The Environmental Protection Agency report says climate change is unequivocally causing hurricanes and heat waves.
Save the whale, and it'll save you too, say Australian scientists, by recycling iron in the ocean through its poo.
The oceans are acidifying more quickly than at any time in hundreds of thousands of years, the National Research Council has reported to Congress.
Half the heat believed to have built up on Earth in recent years can't be accounted for.
Eco-friendly lighting might actually start being some use, with the launch of an LED lightbulb from GE that's claimed to produce nearly as much light as a 40-watt incandescent bulb, while lasting more than 25 times as long.
An MIT team has managed what amounts to artificial photosynthesis, using a modified virus and sunlight to split water into hydrogen and oxygen atoms.
NASA, the US Navy and Scripps Institution of Oceanography at UC San Diego have successfully tested the first robotic underwater vehicle to be powered entirely by natural ocean thermal energy.
Researchers have proposed a wind power grid linking offshore turbines along the east coast of the US as a way of smoothing out fluctuations in supply.
The UK government's first official report into the 'Climategate' scandal has concluded that the University of East Anglia did not tamper with climate data.
Greenpeace protested outside the offices of Dell yesterday in Bangalore, Amsterdam and Copenhagen, as Dell execs consider ways of cleaning up the company's products.
New NASA measurements show that the Gulf Stream has not slowed down over the past 15 years. In fact, it may even have sped up slightly.