French President Emmanuel Macron took a jab at President Donald Trump for his skepticism about climate change during his speech at the World Economic Forum in Davos on Thursday.

“For sure with Davos, when you look outside,” Macron said, referring to the snowscape in wintry Davos, “it could be hard to believe in global warming.

“Obviously, and fortunately, you didn’t invite anyone skeptical with global warming this year,” Macron said, a not-so-subtle reference to Trump. The audience laughed.

Macron is set to join Trump for his White House’s first state dinner. No date has been set yet.

Trump has repeatedly called into question humans’ contribution to global warming. And during Trump’s own speech at Davos, on Friday, he made no mention of climate change. But many of the other leaders did.

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“Everyone talks about reducing carbon emissions, but there are very few people or countries who back their words with their resources to help developing countries to adopt appropriate technology,” said Indian Prime Minister Narendra Modi.

In his first year as president, Trump announced his intention to pull the U.S. out of the Paris agreement, which committed the U.S. to help fund lesser-developed countries' efforts to move away from fossil fuel-based technologies.

At the last conference, Davos’s organizers surveyed attendees, and found that among the world leaders at the conference, of their top five global concerns, four were related to climate change. (Their top concern in 2017 was the proliferation of weapons of mass destruction.)

Heads of multibillion-dollar multinationals, as well as other heads of state, took their time on the podium at Davos to highlight the economic opportunity that addressing climate change could bring.

“Climate change is the next century’s biggest financial and business opportunity,” said Anand Mahindra, chairman of the Mahindra Group, a $19 billion company, according to Reuters.

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And the Chinese delegation at the conference acknowledged both humans’ role in contributing to atmosphere-warming greenhouse gas emissions and their commitment to meeting the goals outlined in the Paris deal. India’s minister of state commerce, too, said the country was “no longer on the fringe” of climate change policies and technologies, according to the New York Times.

Trump, during his speech, railed about “how nasty, how mean, how vicious, and how fake the press can be.”