New study reconciles a dispute about how fast global warming will happen - Over the shortest timeframes of a year or less, the study found that temperatures will rise by about 2°C once carbon dioxide levels have doubled, and close to a century thereafter, temperatures will rise most likely 2.9°C.

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New study reconciles a dispute about how fast global warming will happen - Over the shortest timeframes of a year or less, the study found that temperatures will rise by about 2°C once carbon dioxide levels have doubled, and close to a century thereafter, temperatures will rise most likely 2.9°C.