Global warming is moving much more quickly than scientists thought it would. Even if the biggest current and prospective emitters - the United States, China and India - were to slam on the brakes today, the earth would continue to heat up for decades. At best, we may be able to slow things down and deal with the consequences, without social and political breakdown. Gwynne Dyer examines several radical short- and medium-term measures now being considered--all of them controversial

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