Speaking at the Bloomberg New Energy Finance conference in New York this week, he said: “I’m not going to tell the president of the United States to walk away from the Paris accord. I will say that we need to renegotiate it.”
The White House is expected to decide by next month on whether or not to stay in the landmark Paris Agreement limiting global carbon emissions, signed by more than 190 nations.
Reports claim Mr Rick wants the US to push European nations to take a larger share of the emissions reductions.
He added the US will use its energy resources to advance energy security.
The Energy Secretary said: “One of the most important actions we can take is to use our shale gas resources and begin shipping LNG.
“Energy policy is not just a vital element of US economic policy but also a vital element of US foreign policy.”