Bloomberg: Australian "polity’ prefers the "comfort of ignorance’ on China taking a lead role on battling climate change, according to the government’s global warming adviser Ross Garnaut. Garnaut, whose recommendations formed the government’s shelved plan to battle climate change, said China is exercising leadership on the issue. His comments follow a Prime Minister Kevin Rudd speech on April 23 urging China to take a greater "leadership role’ as its economic power grows. "Calling for …