Boxer and Kerry have called for emissions to fall to 80% of 2005 levels by 2020, 58% by 2030 and 17% by 2050. The House bill, passed in June, differed slightly, calling for emissions to be reduced to 83% of 2005 levels by 2020. Both drafts had the same 2050 target and outlined the basis for a federal carbon cap-and-trade scheme.
It is hoped the US will have firm legislation on the table in time for UN climate change talks in Copenhagen in December, where the country will widely be expected to ta
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