Guardian: Europe Views itself as the world leader and wants to limit climate change to 2C above pre-industrial levels. Has pledged to cut carbon emissions by 20% by 2020, and to raise this to 30% if there is agreement at Copenhagen US The Bush administration regularly stalled on climate targets. Barack Obama’s team has yet to make its position clear, but has promised “vigorous engagement” at Copenhagen. Will want greater effort from developing countries, China in …