India, Sept. 24 -- US President Donald Trump on Tuesday described climate change as the "greatest con job ever perpetrated on the world," dismissing decades of scientific research while addressing the United Nations General Assembly in New York.

Calling the phenomenon a "scam," Trump said: "It used to be global cooling. If you look back in the 1920s and 1930s, they said global cooling would kill the world. Then they said global warming would kill the world. But then it started getting cooler. So now they just call it climate change, because if it goes higher or lower, whatever happens, it's climate change."

The remarks come ahead of the 2025 UN Climate Summit, where nations are expected to present updated climate action plans.

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