From 5th…20% of  carbon dioxide, currently in the atmosphere, will stay there for unimaginably long time—more than 1,000 years. Even if we completely cease all  emissions, warming will continue for “many centuries.” “A large fraction of climate change, is thus irreversible on human time scale.”…only way out..if our emission levels were “strongly negative for a sustained period”—which, to put it mildly, seems highly unlikely.

>readmore> Mother Jones