"These international agreements, the tradition has been that you carry them forward across administrations, particularly if, once you actually examine them, it turns out that they are doing good for us and binding other countries into behaviour that will help us," Obama, 55, told reporters at a White House news conference.
He said the Iranian nuclear deal was good example of the "gap between" some of the rhetoric in this town, not unique to the President-elect, and the reality.
"At the time, the main argument against it was, Iran wouldn't abide by the deal. That they would cheat. We now have over a year of evidence that they have abided by the agreement. That's not just my opinion. It's not just people in my administration. That's the opinion of Israeli military and intelligence officers who are part of a government that vehemently opposed the deal," he said.
"Now, you've got 200 countries that have signed up for this thing, and the good news is that what we've been able to show over the last five, six, eight years is that it's possible to grow the economy really fast and possible to bring down carbon emissions as well.
"What the Paris agreement now does is say to China and India and other countries that are potentially polluting, come on board. Let's work together so you guys do the same thing. And the biggest threat, when it comes to climate change and pollution, isn't going to come from us because we only have 300 million people. It's going to come from China with over 1 billion people and India with over 1 billion people," he said.
Obama said the agreement was not between the US and the
Iranians, but between the P5+1 and other countries some of which are America's close allies.
"For us to pull out would then require us to start sanctioning those other countries in Europe or China or Russia, that were still abiding by the deal, because from their perspective, Iran had done what it was supposed to do," he said.
