This document presents a strategy for how the world can transition to low-sulfur fuels and cleaner diesel vehicles within the next decade. It also outlines why this is imperative for both health and climate goals. Achieving this change will require a focus on countries that are fuel importers, those struggling to secure financing for refinery upgrades, and those that have yet to match already- available low-sulfur fuels with the vehicle emission standards that secure the full air quality and climate benefits of desulfurization.