is already happening. in the satellite images taken between 1980 and present, tropical cyclones have moved poleward. the key risk is changing where they occur, so we have little confidence in whether the total number of hurricanes every year on the planet will increase or decrease, but what we're finding here is that where they occur will change. so, some areas, in particular higher latitudes, including new york and boston and even western europe, will experience relatively more hurricanes than the deep tropics. it's worth saying that we believe that hurricanes haven't existed over this wider range of latitudes at any point over the last 3 million years, which is certainly beyond human civilisation, so regions that haven't experienced hurricanes at all and haven't developed to protect themselves from hurricanes will begin to experience these damages. conservationists at chester zoo have helped experts in mexico reintroduce a species of fish