Guardian: US energy secretary Steven Chu will fly to Europe this week to begin talks that will be crucial in the global battle against climate change. The 61-year-old physicist will hold key discussions with energy ministers from the G8 nations in Rome before travelling to London to take part in a debate with Nobel prize winners on global warming. The arrival of Chu, himself a physics Nobel laureate, comes as the scientist-turned-politician finds himself attacked by environmentalists over …