Trump ratcheted up his questionable claims about the environment and how to deal, if at all, with the threats to it

In the past decade at the forefront of US politics, Donald Trump has unleashed a barrage of unusual, misleading or dubious assertions about the climate crisis, which he most famously called a “hoax”.

This year has seen Trump ratchet up his often questionable claims about the environment and how to deal, if at all, with the threats to it. In a year littered with lies and wild declarations, these are the five that stood out as the most startling.