'I'm not a scientist, either,' president says

President Obama flipped the script on Republicans on the science behind climate change, admitting he's not a scientist, but he knows "a lot of really good" ones. 

"I’ve heard some folks try to dodge the evidence by saying they’re not scientists; that we don’t have enough information to act," Obama said Tuesday night. "Well, I’m not a scientist, either.  But you know what — I know a lot of really good scientists at NASA, and NOAA, and at our major universities." 

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The president said he trusts "the best scientists in the world" that are saying "our activities are changing the climate."

Senate Majority Leader Mitch McConnellAddison (Mitch) Mitchell McConnellDems ready aggressive response to Trump emergency order, as GOP splinters Green New Deal Resolution invites big picture governing ‘Contingency’ spending in 3B budget deal comes under fire MORE (R-Ky.), and Speaker John BoehnerJohn Andrew BoehnerBill Clinton jokes no one would skip Dingell's funeral: 'Only time' we could get the last word Left flexes muscle in immigration talks Former Ryan aide moves to K street MORE (R-Ohio) have often used the line when arguing against the administration's climate agenda. 

He stressed that if the U.S. doesn't "act forcefully," the country will see more rising oceans, longer heat waves, droughts, floods, and disruptions that can "trigger greater migration, conflict, and hunger around the globe."

"The Pentagon says that climate change poses immediate risks to our national security," Obama said. "We should act like it."