New Scientist: In fact, even if the world does cool over the next few years as some predict, it in no way undermines the certainty about long-term warming due to greenhouse gas emissions. Let’s start with a thought experiment. Suppose you managed to find some children who knew nothing about the oceans, handed them a long measuring stick and sent them off to the seaside find out whether sea level is rising or falling. As soon they saw the waves crashing on the shore, the children would realise …