"Paris, I'm studying. I do say this - I don't want that agreement to put us at a competitive disadvantage with other countries. As you know, there are different times and different time limits on that agreement. I don't want that to give China or other countries signing agreements and advantage over us," Trump told Fox News.
Trump said he was "still open-minded (on climate change). "Nobody really knows. I'm somebody that gets it. And nobody really knows," he said.
He, however, said as America was engaged on the issue of climate change, China - the world's biggest polluter - was "eating our lunch".
"Yes, I think it's a big scam for a lot of people to make a lot of money," he told the American network. "In the meantime, China is eating our lunch because they don't partake in all of the rules and regulations that we do," he said.
"If you look at what China is doing, if you look at what - I could name country after country. You look at what's happening in Mexico where our people - just our plants are being built. They don't wait ten years to get an approval to build a plant, OK? They build it like the following day or the following week," he said.