Associated Press: Environmentalists broke into power stations across Italy and shed their clothes in downtown Rome on Wednesday as world leaders discussed a new deal to combat global warming. Dozens of activists from 18 countries scaled smokestacks and occupied four coal-fired Italian power plants, hanging banners that called on the Group of Eight summit in central Italy to take the lead in fighting climate change, Greenpeace said. Italian energy giant Enel, which owns three of the plants, said …