Presumptive Republican presidential nominee Donald Trump told reporters he would renegotiate the international climate change deal struck in Paris in December 2015.

“I will be looking at that very, very seriously,” Trump said. “I will be renegotiating those agreements, at a minimum. And at a maximum I may do something else.”

Trump went on to say “those agreements are one-sided agreements and they are bad for the United States.” He went further to insinuate the other heavy polluting nations who signed the deal wouldn’t stick to their end of the bargain.

“Not a big fan because other countries don’t adhere to it, and China doesn’t adhere to it, and China’s spewing into the atmosphere,” he said of the plan that strives to limit global rise in temperature to less than two degrees Celsius through a combination of actions, including reducing greenhouse gas emissions. The U.S. pledged to lower its emissions 26 to 28 percent of 2005 levels by 2025, and China pledged to halt increases in carbon emissions by 2030.