The path to a meaningful deal at the Copenhagen climate summit in December seems more treacherous in the wake of last week's meeting of the G8 nations.rnLeaders gathered in the quake-struck Italian townrnof L'Aquila promised to try to prevent global temperatures from rising more than 2 ℃ above pre-industrial temperatures. They also said that rich countries would cut their aggregated greenhouse-gas emissions by 80% by 2050, and, with other countries, would cut global emissions by 50% over the same period. But they made no commitment to reducing emissions any earlier and did not agree on a base year against which to measure national emissions cuts.
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