Bloomberg: Postponing action on climate change will make the problem more expensive to manage later if it can still be managed at all. Thats the message of a new White House report on fighting global warming, released Tuesday. Dealing with climate change is a matter of managing risk. As the report says, its a question of insurance, which every voter understands. You insure your house against fire not because you are certain it will burn down but to guard against the risk that it might. Yes, climate change...