Financial Times: The marathon negotiations that concluded with a climate change package in Brussels yesterday will have to be reopened at the end of next year if United Nations climate change talks are successful. The European Union has agreed to a 20 per cent cut in greenhouse gas emissions by 2020. But it has pledged to raise the target to 30 per cent if a deal is reached at a conference in Copenhagen next December on a replacement for the Kyoto protocol. Other developed nations such as …