Guardian: So we finally have the long-awaited emissions reduction offers from the US and China: a 17% reduction from 2005 levels from the US and a 40-45% reduction in “the carbon intensity of the economy” by 2020 from China. The momentum towards the UN climate talks in Copenhagen seems to be gaining by the hour and these developments must be welcomed. The EU’s initial offer of a 20% cut on 1990 levels over the same time period – finalised last month – is the third important part of the jigsaw. …