Donald Trump has expressed doubts over the existence of climate change, as it is understood by the vast majority of scientists. After proclaiming his belief in “clean air and clean water,” Trump questioned some of the central tenets of climate science in an interview with Piers Morgan. “The ice caps were going to melt, they were going to be gone by now, but now they’re setting records. They’re at a record level,” Trump continued. His comments echo arguments often made by climate change sceptics that global warming has stopped, or even reversed, in recent years.