This report assesses progress in 2018 toward implementing the Climate and Clean Air Coalition's (CCAC) global strategy to introduce low-sulfur fuels and cleaner diesel vehicles. The rapid reduction of diesel black carbon emissions is one element of a strategy proposed to reduce near-term climate warming by an average of 0.5°C over 25 years.

At the North American Leaders Summit (NALS) in June 2016, the heads of the governments of Canada, Mexico, and the United States agreed to “commit to reduce air pollutant emissions by aligning air pollutant emission standards for light- and heavy-duty vehicles and corresponding ultralow-sulfur fuel standards by 2018.” To support regulatory effort