Even if the world makes long-term cuts to carbon emissions of 90% relative to 2009 levels, it will miss the target of limiting global warming to 2 °C by the end of the millennium. Only if larger cuts are made -both long term and globally, starting in the next couple of decades - at an annual rate of at least 3% could that target be met. Pierre Friedlingstein at the University of Exeter, UK, and his colleagues used a coupled climate-carbon-cycle model to simulate global warming until the year 3000 in various scenarios.
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