Professor Hawking said US President Donald Trump’s decision to withdraw from the Paris Climate Agreement, has doomed Earth to one day become uninhabitable.
And repeating his warning, the physicist said climate change deniers should look to Venus which is now a boiling planet
In the second episode of his Emmy-winning web series Favourite Places, which sees the 76-year old traverse the universe in heavy CGI backdrops, Prof Hawking visits the planet Venus.
Venus, the second closest planet to the sun, was once Earth-like.
But a build-up of greenhouse gasses in its atmosphere turned the planet into a boiling celestial body with temperatures of 250 degrees celsius and wind speeds of up to 100 metres per second.
NASA says it is a classic example of how the slightest of differences in a planet’s greenhouse can massively effect its future and turn it into an uninhabitable place.
Prof Hawking says in the show anyone who does not believe in global warming should do some research on Venus.
The University of Cambridge alumni said: “Next time you meet a climate change denier, tell them to take a trip to Venus.
“I will pay the fare.”
When Mr Trump pulled the US out of the Paris Climate Agreement last year, Prof Hawking said: “We are close to the tipping point where global warming becomes irreversible.
“Trump’s action could push the Earth over the brink, to become like Venus, with a temperature of two hundred and fifty degrees, and raining sulphuric acid.
“Climate change is one of the great dangers we face and it’s one we can prevent if we act now.
“By denying the evidence for climate change, and pulling out of the Paris Climate Agreement, Donald Trump will cause avoidable environmental damage to our beautiful planet, endangering the natural world, for us and our children.”