Amid a discussion about how to boost the U.S. economy, Democratic presidential nominee Hillary Clinton said her opponent Donald Trump "thinks that climate change is a hoax perpetrated by the Chinese."

"I think it’s real," she said during a Sept. 26 debate in New York. "I think science is real."

Trump interrupted.

"I did not — I did not — I do not say that. I do not say that," he said.

Well, it turns out he did say that climate change is a "hoax" of Chinese origin — as we’ve found in previous fact-checks.

On Nov. 6, 2012, Trump tweeted, "The concept of global warming was created by and for the Chinese in order to make U.S. manufacturing non-competitive."

So Trump clearly did say, at least once, that climate change was a Chinese hoax.

The subject of this 2012 tweet came up during a Jan. 18, 2016, episode of Fox & Friends. In that interview, Trump indicated the tweet was a joke.

"Well, I think the climate change is just a very, very expensive form of tax," Trump said. "A lot of people are making a lot of money. I know much about climate change. I'd be — received environmental awards. And I often joke that this is done for the benefit of China. Obviously, I joke. But this is done for the benefit of China, because China does not do anything to help climate change. They burn everything you could burn; they couldn't care less. They have very — you know, their standards are nothing. But they — in the meantime, they can undercut us on price. So it's very hard on our business." (Emphasis added.)

Trump may call the mention of China’s role a joke, but he certainly has a lengthy record of using the word "hoax" to describe climate change. (For the record, in 2014 we rated a claim that climate change is a "hoax" Pants on Fire.)

Here are a few examples:

On Dec. 30, 2015, Trump told the crowd at a rally in Hilton Head, S.C., "Obama's talking about all of this with the global warming and … a lot of it's a hoax. It's a hoax. I mean, it's a money-making industry, okay? It's a hoax, a lot of it."

On Jan. 25, 2014, Trump tweeted, "NBC News just called it the great freeze — coldest weather in years. Is our country still spending money on the GLOBAL WARMING HOAX?"

On Jan. 29, 2014, Trump tweeted: "Snowing in Texas and Louisiana, record setting freezing temperatures throughout the country and beyond. Global warming is an expensive hoax!"

That same day, he tweeted, "Give me clean, beautiful and healthy air - not the same old climate change (global warming) bullshit! I am tired of hearing this nonsense."

Trump also called climate change a "hoax" on the Jan. 6, 2014, edition of Fox & Friends.

In addition, he said on the Sept. 24, 2015, edition of CNN’s New Day, "I don’t believe in climate change."

Our ruling

Trump said, "I did not — I did not — I do not say that. I do not say that" climate change is a hoax perpetrated by the Chinese.

He certainly did say it — in a tweet four years ago.

While he has since described that remark as a "joke," Trump has repeatedly called climate change a "hoax" in speeches, tweets and media appearances. And he has said as recently as Jan. 18, 2016, that action on climate change "is done for the benefit of China."

Because he hasn’t pushed this exact theory in recent years, as far as we’ve seen, there’s a tiny grain of truth to Trump’s claim. But it’s still inaccurate. For that, we rate his statement Mostly False.

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