initiatives / Clean Air


Motor vehicle emissions harm public health and the environment. The ICCT estimates that exposure to vehicle emissions in the year 2005 produced at least 242,000 global early deaths. Emissions of fine particulate matter, ozone-precursors, air toxics and other harmful pollutants also produce environmental damage in the form of crop fertility losses and near-term climate warming.

Featured Work



Recently Released

Impacts and mitigation of excess diesel NOx emissions in 11 major vehicle markets
Diesel vehicles in major markets produce over 50% more NOx than official certification limits indicate. Study links these excess NOx emissions to ~38,000 premature deaths worldwide in 2015—mostly in the EU, China, and India. 
Alternatives to heavy fuel oil use in the Arctic: Economic and environmental tradeoffs
Compares the economic and environmental tradeoffs of switching from HFO to two alternative fuels, distillate fuel and liquefied natural gas (LNG), in the IMO Arctic, as defined in the IMO Polar Code.
Working paper
Impacts of world class vehicle efficiency and emissions regulations in select G20 countries
Characterizes the climate and health benefits of adopting world-class standards for new vehicle efficiency/CO2 and conventional pollutant emissions in all members of the G20 Transport Task Group.



From the ICCT Blogs

Maximizing aircraft fuel efficiency: Make sure the economics add up
Richard Golaszewski's insights on what a successful clean-sheet aircraft program looks like—from research and development to sales, what made it successful, and what makes sense for manufacturers and airlines today to repeat that success.
Staff Blog
The IMO just took a significant step toward reducing the use of heavy fuel oil in the Arctic
The IMO will consider concrete proposals on ways to reduce the risks of HFO at the next meeting of its Marine Environment Protection Committee, MEPC 72 in April 2018. A decision on what should be done to mitigate the risks of HFO could come as early as 2019.
Staff Blog
Where does the U.S. stand on biofuels now?
The messages on cost, greenhouse gas emissions, and latitude in interpreting the statute may not be entirely consistent, but one thing is clear: U.S. EPA is now intent on dialing down RFS obligations, and that is a real change.
Staff Blog