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"A £60m pledge from the UK government puts Reaction Engines' Sabre rocket on course to change space exploration forever"
"A combination of burning trees for energy and capturing and storing carbon dioxide could offset and even reverse emissions"
New studies suggest injecting water for geothermal power or fracking can lead to larger earthquakes than previously thought _blank
"...concerns over the greenhouse savings from biofuels, and the potential for food price rises as crops are diverted to produce ethanol."
"Human-powered helicopter hovers for more than a minute, defying sceptics' claims it was scientifically impossible"
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