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A climate congress in March aims to update the assessment of global warming. Olive Heffernan talks to the meeting's chair about the tasks that lie ahead.
As the planet warms, vast stores of methane — a potent greenhouse gas — could be released from frozen deposits on land and under the ocean. Amanda Leigh Mascarelli reports on the race to understand a ticking time bomb.
Due to launch 24 February, NASA's Orbiting Carbon Observatory (OCO) will measure carbon dioxide in the Earth's atmosphere with a precision high enough to detect the origin and fate of carbon emissions. Principal investigator David Crisp talks to Anna Barnett about hopes and expectations for the programme.
