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    Immediate Action Needed to Limit Warming to 2 C?

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    Immediate Action Needed to Limit Warming to 2 C?
    COP15 - United Nations Climate Change Conference
    Authors of the landmark 2009 climate report "The Copenhagen Diagnosis" estimate that by 2020 industrial nations must reduce their greenhouse gas emissions by around 40 per cent below 1990 levels to secure a decent chance of avoiding dangerous human interference with the climate system.