The US Navy recently used a 50/50 biofuel blend to fly an MH60S Sea Hawk - a helicopter typically deployed for anti-surface warfare and combat missions.
We need to expand the popular concept of geothermal power. Really, it's not just about geysers spurting water and steam, Old Faithful-like, high into the air.
We've certainly seen sports leagues play ball with solar power before, but a stadium design recently unveiled by the Philadelphia Eagles is promising to score a clean energy touchdown to top all others.
No, it's not a breakaway movement from Steampunk - it's serious science. A group of materials scientists have developed a new type of fuel cell that they say could soon lead to methane-powered laptops.
Consumers were certainly quick to adopt hybrid cars when they debuted around a decade ago - particularly the Toyota Prius.
But will they do the same with the new plug-in hybrids (PHEVs) and electric vehicles (EVs)?
While showcasing its new Fit EV Concept vehicle at the Los Angeles Auto Show this week, Honda also unwrapped its plug-in hybrid platform.
Planes designed to look like birds would be more aerodynamic than traditional shapes, say a pair of engineers in California and South Africa.
The world economic recession appears to have been responsible for a fall in global emissions of carbon dioxide betweem 2008 and 2009.
A new pedal-powered sewage disposal system could help fight diseases such as dysentery, cholera and typhoid, its inventor hopes.
Hundreds of business leaders from around the world yesterday released a demand for "an ambitious, robust and equitable global deal on climate change".
Cities could one day be lit by glowing trees, thanks to a discovery at Taiwan's National Cheng Kung University (NCKU).
Carbon sequestration - much touted as a cure-all for unsustainable levels of polluting emissions - could increase contaminants in drinking water ten-fold, a new study has found.
Unless R&D is stepped up dramatically, stock market expectations indicate that global oil supplies will run out 90 years before replacement technologies are ready.
Following the Gulf oil spill, many people were surprised by how quickly the oil seemed to disappear. Now scientists say they know where it went - into the food chain.
The University of Greenwich’s School of Architecture & Construction is using synthetic biology to create 'living' buildings.
The circulation of water in the Atlantic Ocean reversed its direction less than 20,000 years ago, a study has found.
You can turn down the heating; you can switch to a hybrid car. But unless you can stop, um, we'd better call it excreting, your efforts won't go a long way towards cutting your carbon emissions.
The trend towards alternative energy sources will trigger international trade wars, a Colorado Geological Survey scientist will tomorrow warn the Geological Society of America.
One in five vertebrate species could be set for extinction, says an international group of scientists.
The US Department of the Interior has approved the world's largest solar energy project.