The 70-year old tweeted back in 2012 that climate change was a hoax “invented by and for the Chinese in order to make US manufacturing non-competitive”. However he later distanced himself from this, claiming that it was a joke.

Nonetheless, the outspoken billionaire does believe in climate change in a sense, but believes that it is a natural weather cycle.

He told radio personality Hugh Hewitt: “Obama thinks it’s the number one problem of the world today. And I think it’s very low on the list.

“So I am not a believer, and I will, unless somebody can prove something to me, I believe there’s weather. I believe there’s change, and I believe it goes up and it goes down, and it goes up again.”