President Donald Trump scored a victory for consumers on Friday by effectively blocking a United Nations carbon tax scheme for at least a year. The battle isn’t over yet, as the Trump administration still needs to convince 40 other nations to abandon what would be the world’s first global carbon tax.

It comes from the International Maritime Organization, which was created by the U.N. in 1948 and is the implementing international agency for several international treaties, including the International Convention for the Prevention of Pollution from Ships, otherwise known as MARPOL. MARPOL was signed in 1973 after a number of oil tanker accidents, and in 1997, MARPOL Annex VI gave the IMO jurisdiction over shipping air emissions as well.