Donald Trump has lashed out at world leaders at the UN General Assembly, taking aim at climate policies, migration and recent moves by US allies to recognise Palestine.

The meeting took place at the UN headquarters in New York, where Trump opened his speech by praising the United States and himself, declaring his presidency had created a “golden age” for America. He claimed that his personal efforts to attain peace around the world were unmatched and deserving of a Nobel Peace Prize.

“In a period of just seven months, I have ended seven unendable wars,” Trump said.

These claims have drawn attention from multiple media outlets, which have fact-checked what he said and concluded that they were false.

As his speech continued, Trump shifted his focus to Europe, accusing the continent of being overwhelmed by what he called a “double-tailed monster”. He said Europe’s immigration policies would create irreversible damage unless they were changed. Many European representatives were visibly uncomfortable when Trump spoke, but his American supporters applauded.

“Europe is in serious trouble,” Trump said. “You want to be politically correct, and you are destroying your heritage. Your countries are going to hell.”

Trump mocked international attempts to address climate change, rejecting the credibility of the science and saying it was being driven by politics. He said that initiatives for renewable energy were ruining economies and raising energy costs relative to fossil fuels.

Trump referred to climate change as “the greatest con job ever perpetrated on the world.”

When talking about the Middle East, he denounced countries such as Australia, the United Kingdom, and Canada that have recently recognised the Palestinian state. He called the action a “reward for terrorism” and contended that it would give Hamas more confidence and prolong the war in Gaza.

“Some of this body is seeking to unilaterally recognise a Palestinian state. The rewards would be too great for Hamas.”

There are now over 150 countries that have recognised Palestine as a sovereign nation.

The speech ran for 56 minutes, which is significantly longer than the 15-minute limit.

Several world leaders have criticised Trump’s speech, saying he has caused tensions around the world and undermined international cooperation. Australian Prime Minister Anthony Albanese will meet with Donald Trump later this month, where policies around the Middle East are expected to be a key focus.