BBC: EU leaders have agreed to finish talks by the end of the year on an ambitious plan to fight climate change. After a two-day summit in Brussels, leaders for the 27 nations said they hoped new legislation would be enacted in early 2009. The bloc aims to implement a 20% cut in greenhouse gases by 2020, compared with 1990 levels. But EU leaders said they needed to look at the consequences for heavy industry and that could complicate negotiations. The summit also …