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Climate change: Can 12 billion tonnes of carbon be sucked from the air?

Climate change: Can 12 billion tonnes of carbon be sucked from the air?

Science
Is it remotely feasible to remove 12 billion tonnes of carbon dioxide from the air? Every year. For decades to come.That's the challenge posed by the latest conclusions of the UN's climate science panel.It says that only by pulling this heat-trapping gas out of the atmosphere can we avoid dangerous climate change.But according to one leading researcher, there's a bit of a hitch: "We haven't a clue how to do it".The problem is that scientists reckon that even if the world manages to cut emissions of the gas, it will no longer be enough to avoid the worst impacts. We've got to go a step further, they say, and find ways of doing something never attempted before: get rid of the gas that's already out there. And get started on it as ...
Antarctica loses three trillion tonnes of ice in 25 years

Antarctica loses three trillion tonnes of ice in 25 years

Science
Antarctica is shedding ice at an accelerating rate. Satellites monitoring the state of the White Continent indicate some 200 billion tonnes a year are now being lost to the ocean as a result of melting. This is pushing up global sea levels by 0.6mm annually - a three-fold increase since 2012 when the last such assessment was undertaken. Scientists report the new numbers in the journal Nature.Governments will need to take account of the information and its accelerating trend as they plan future defences to protect low-lying coastal communities. The researchers say the losses are occurring predominantly in the West of the continent, where warm waters are getting under and melting the fronts of glaciers that terminate in the ocean. ...