Guardian: A climatologist who is trying to explain why even the most immediate and drastic steps to reduce carbon dioxide emissions may not save the coral reefs, has embarked on a metaphor for climate change. “The climate is like this big ship, right? We are all on this big ship and the problem is once you hit the brakes it takes a long time for the ship to actually slow down and stop,” says Simon Donner of the University of British Columbia. “In our case the ship is the Titanic and we are …