A Greenpeace activist holds a sign with the message "Right to Clean Air" at the Victory Monument in central Bangkok to highlight the impacts of air pollution on Thai people's health and to urge the Thailand's Pollution Control Department (PCD) to incorporate PM2.5 in its Air Quality Index.

Transport is one of the major sources of PM2.5 air pollution. The solution will require a comprehensive approach that includes an effective and sustainable transportation system and support energy-efficient vehicles and fuels.