Earth
Renewable energy: The tide is turning
Harness the oceans' ebb and flow and you can generate electricity, whatever the weather
Features
Earth
Renewable energy: Electric dreams
Features
Earth
Newly discovered fungus strips pollutants from oil
News
Earth
Economic turmoil could scupper EU climate plans
News
Earth
High-tech sponge could take hydrogen cars further
News
Earth
Google announces plan to wean US off coal and oil
News
Earth
Is Google gobbling up too much power?
News
Earth
Tax credits promise brighter outlook for solar energy
News
Earth
Steam power takes to the road again
Features
Technology
Invention special: Green technology
This week's new patent applications aim to make the world a cleaner place: from electricity generation by osmosis, to crops that refine biofuels, and nod-powered headsets
News
Earth
Fuel thinner turns diesel cars into greener machines
News
Earth
Climate change: how Obama and McCain compare
News
Earth
US House lifts 27-year ban on coastal drilling
News
Earth
Editorial: A helping hand for clean technologies
Opinion