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Recently revisited as a quick fix for global warming, 'geoengineering' could rapidly cool the climate but might also play havoc with the planet. Hannah Hoag reports.
Scientists claim to have located the 'missing carbon sink' in tropical forests that are absorbing around one billion tonnes more carbon than previously thought. Jane Burgermeister investigates.
Companies worldwide are now competing to cut their carbon emissions, but is this trend one of environmental concern, hard-headed business or careful PR? Kurt Kleiner investigates.
