Addressing potential voters in Tennessee, Ohio Gov. John Kasich said that he believes human activity impacts climate change, though “to what degree we don’t know.”

With regard to the international climate change summit ongoing in Paris this week and next, Kasich said he would attend such conferences as president, but would not work on a pact toward reducing greenhouse gas emissions.

Kasich added that he oppose Environmental Protection Agency rules aimed at reducing greenhouse gas emissions, which he said are “potentially going to throw a lot of people out of work in Ohio.”