The Sierra Club environmental advocacy group released a report to the Associated Press today detailing all climate change-related statements given by leaders from 195 nations. The study points out Trump is the only potential world leader who’s said climate change isn’t real, setting him apart from all U.S. allies like the UK and Germany as well as China – the world’s largest polluter – and even rogue nations like North Korea.

“Donald Trump has said a lot about the kind of amazing deals he’ll make with foreign nations,” Sierra Club Spokesman Adam Beitman tells Fortune. “What’s clear from this study is he’s going to be starting out in total disagreement from the very beginning on a very key issue that the rest of the world is in total agreement with.”

In earlier statements, Trump has referred to climate change as a “myth” and a “con job,” promising to renegotiate America’s position in the legally binding Paris accord signed by all participating nations at the inaugural Paris Climate Change Conference last year.

In contrast, Chinese President Xi Jinping, whose country leads the world in CO2 emissions, has called for a reduction of the number of coal-fired power plants in his nation and a conversion to alternative energy sources like wind turbines and solar panels.

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Russian President Vladimir Putin and Saudi King Salman also disagree with Trump.

“The Kingdom of Saudi Arabia will be engaged in several actions to address climate change and make its development more sustainable,” the Saudi Government wrote in a statement last year.

The Sierra Club wants its report serves as a warning to voters.

“There’s one person who wants to let the whole [world] burn and it’s Donald Trump,” Beitman said. “We can’t let him be President.”

The Trump campaign did not return calls for comment.