Oil refiners are defending new United Nations environmental rules against private consultants’ forecasts that they will hurt consumers in the run-up to the 2020 election, rather than aiding President Trump’s energy dominance agenda.

The refinery industry supports the impending new 2020 International Maritime Organization rules, which call for the use of cleaner, low-sulfur fuels in all seagoing vessels and could drive up costs by diverting millions of gallons of diesel, jet fuel, and heating oil to the maritime sector.