Ambient ultrafine particles: evidence for policy makers

This report specifically addresses policy makers in the field of environment and public health, and provides a state-of-the-art summary on the questions: What are ultrafine particles? Why are ultrafine particles important? Why are ultrafine particles a special challenge?

It provides an overview of the current state of knowledge on:

• Exposure to ultrafine particles and sources of emissions
• Toxicology
• Epidemiology
• Regulation