Small waves crash over rocks across the harbour from the Sydney city skyline. REUTERS/Tim Wimborne
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The window of opportunity for humanity to cap global warming by slashing greenhouse gases is closing faster than previously thought, according to a study released Tuesday.CO2 emissions were about 40 billion tonnes in 2015, and are projected to continue climbing over the next decade, even taking into account the carbon-cutting pledges submitted by nearly 190 nations as part of the Paris Agreement.If current emission rates are held steady, the 2C carbon budget would be spent in about 15 to 30 years, according to the new calculations.Rogelj and half-a-dozen colleagues sought to understand why previous estimates of the carbon budget vary so widely.
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