WASHINGTON - US President Donald Trump made a surprise appearance at a climate change summit at the United Nations General Assembly on Monday .
The president in the past has questioned man-made climate change, at one point calling it a Chinese hoax. "It's not a snub at all. I'm very busy, I'm going on the flights today," Trump said as he departed the White House on Sunday."The floods are very important to me, and uh, climate change - everything is very important."
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