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11-Nov-11
"Airlines are starting to test biofuels on commercial routes, but 'sustainable' alternatives to kerosene remain controversial"
8-Nov-11
"US airlines are attempting to demonstrate their clean energy credentials, scheduling flights partially powered by biofuels"
1-Nov-11
"This Q&A is part of the Guardian's ultimate climate change FAQ"
23-Aug-11
For decades, scientists have been predicting that, one day, the same process that powers the sun will give us virtually unlimited cheap, clean electricity. Are they wrong?
19-Aug-11
Plans for hundreds of wind turbines have been blocked over claims that vibrations will interfere with recording station
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