Independent (UK): Is it true that the world has a new agreement to fight climate change? Yes — the Copenhagen accord, signed at the UN climate conference in the Danish capital late on Friday night. What does it do? For the first time it enshrines the recognition of all the world’s countries that we should work together to keep the global temperature from rising more than two degrees Centigrade above the level pertaining before the industrial revolution about 200 years ago, when we began …