Far from ideal (or even clear), Mexico’s has offered a concession that may still mean a violating trade pacts, leading to a trade dispute with Washington.

A 2020 decree by Mexico’s President Andres Manual Lopez Obrador is set to phase out GM corn and glyphosate by 2024 — just 14 short months away. U.S. farmers have been urging the government to challenge the ban — saying that economic damage to both countries could be devastating.

When the numbers are crunched, the results will surprise you.