But here’s a huge caveat: The 2017 funding resolution’s legalese had a loophole. “Although the Congressional Appropriations Act eliminates the line item, it doesn’t prohibit contributions to the IPCC or the UNFCCC,” says Maria Belenky, the director of policy and research at the climate policy research nonprofit Climate Advisors. This is unlike, say, the $3 billion Green Climate Fund, to which contributions were explicitly prohibited. “So, technically, the State Department could find a way to contribute if there’s enough will to do so,” says Belenky. For instance, Secretary of State could pull money from the discretionary Economic Support Fund. The former CEO of Exxon Mobil could also reveal that he’s a lifetime member of the Sierra Club. Possible, but not likely.