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Reining in carbon dioxide levels imperative but possible Implementing a plan to keep rising carbon dioxide levels from reaching potentially dangerous levels could cost less than 1 percent of gross world product as of 2050, a cost that is well within reach of developed and developing nations alike. Moreover, without simultaneous progress in the way energy is found, transformed, transported and used, the world is in danger of facing a severe energy crisis sometime within the next century. Those are the conclusions of a report by Klaus S. Lackner and Jeffrey D. Sachs of The Earth Institute that appears in the most recent issue of Brookings Papers on Economic Activity published by the Brookings Institute.
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