Leonardo DiCaprio has renewed his criticism of the Republican frontrunners in the US Presidential race who deny the threat of climate change.

Republican candidates Donald Trump and Ted Cruz have dismissed climate change with Cruz dismissing it as “pseudo-scientific theory.” Trump recently said that he was “not a big believer in man-made climate change”.

DiCaprio, who recently won the Best Actor Oscar for his lead role in The Revenant, has become increasingly active as an environmentalist and he has said that the next leader of the US should not be someone who refuses to listen to reason.

He used his Oscar acceptance speech last February to deliver a heartfelt message about the dangers of climate change.

Speaking recently in Japan, he said: “We should not have a candidate who doesn’t believe in modern science to be leading our country. Climate change is one of the most concerning issues facing all humanity and the United States needs to do its part.”

The actor has a multi-year partnership deal to make green-themed films for streaming service Netflix and his forthcoming documentary about climate change should raise awareness ahead of the November presidential election.

“We’ve been travelling around the world documenting climate change,” he said, revealing that film makers have filmed in China, India and the North and South Poles on his behalf.