Reducing greenhouse gases harder than we thought

Reducing carbon dioxide will be far more challenging than society has been led to believe, local scientists wrote in an article published in this week's edition of Nature. Roger Pielke Jr. of the University of Colorado and Tom Wigley of the National Center for Atmospheric Research examined one of the reports released last year by the Intergovernmental Panel on Climate Change and concluded that it was overly optimistic.

[not optimistic in the IPCC's doom & gloom forecasts, but optimistic in mankind's ability to affect climate {which by definition includes 'change'}]

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