The Cambridge-based professor also reflected on his career achievements, naming his work on black holes as what he thinks will be a key part of his legacy.
Last month, Trump said his decision to pull the U.S. from the landmark Paris climate agreement was "a reassertion of America's sovereignty".
The study, aimed at debunking the claims made by climate change skeptics, found there wasn't much discrepancy between temperatures measured high above or on the Earth's surface.
Hawking also said climate change is among the greatest dangers facing Earth, and "we can prevent if we act now", but Trump withdrawing from the agreement would cause "avoidable damage to our handsome planet, endangering the natural world, for us and our children". He further said that the US President, hence, would be causing irreversible damage to the masses. "There is no sign of conflict lessening, and the development of militarized technology and weapons of mass destruction could make that disastrous".
"I fear evolution has inbuilt greed and aggression to the human genome".
'The best hope for the survival of the human race might be independent colonies in space'.
The author of "A brief history of time" was a signatory to a letter which expressed his apprehension by saying that "the Republican nominee for President has advocated USA withdrawal from the #Paris accord".
Hawking is not the only one to criticise Trump's decision of opting out from this agreement.
The group led by Christiana Figueres estimated that Earth has about a maximum of 600 billion tons more of carbon dioxide that can be emitted if humans want to have a good chance of holding temperature rise within the Paris-set limit. Here are five other predictions by the 75-year-old.