Royal Dutch Shell has issued its starkest warning yet to the Trump administration to not pull out of the Paris Agreement addressing climate change.

The Anglo-Dutch oil behemoth said withdrawing from the historic 2015 deal to cut greenhouse gas emissions would be unhelpful on a number of fronts, sacrificing diplomatic leverage in international trade deals and impeding U.S. companies.

What I think would happen as a consequence of [withdrawal] is that the U.S. would weaken its own hand by basically uninviting itself from a number of [negotiating] tables, Shell CEO Ben van Beurden told the Financial Times in an interview published Monday morning.

President Donald Trump vowed on the campaign trail to cancel the pact, signed by all but two countries . The White House is split on whether to move ahead with that promise, but sources told HuffPost earlier this month he is leaning toward withdrawal. He could announce a decision by next month, after the conclusion of a G7 summit of the worlds most industrialized democracies. U.S. departure from the Paris Agreement would weaken the accord, despite pledges by other countries, including China, to forge ahead, van Beurden said.

The U.S. has a major crop of companies that deliver technologies that are going to be relevant in the energy transition, and one way or another they will also find themselves probably more disadvantaged than advantaged by the U.S. pulling out of the agreement, he said. So I cannot see where the upside is.

Shell did not respond to a request from HuffPost for comment.