Rarely do companies ask to be taxed. But when the Houston Chronicle editorial board met with representatives from Exxon Mobil Corp. this week, we heard loud and clear their support for an across-the-board tax on carbon emissions.

This puts Exxon alongside other oil and gas companies like BP, Royal Dutch Shell, Total SA and Statoil in standing for a carbon tax. Now it is time for Congress to join their ranks.

Six heads of state and government and the leaders of the World Bank Group and the International Monetary Fund today called on companies and countries to follow up on their ambitions for Paris by putting a price on carbon to drive investment for a cleaner, greener future.