Search the following article: Exposure to ultrafine particles from ambient air and oxidative stress-induced DNA damage. Environmental Health Perspectives, 115(8), 1177-1182.
What are ultrafine particles, and what ar e the health concerns associated with them? Based on the information on UFPs, do you think that UFPs should be considered as a separate class of particulate matter and have established emissions standards or do we need further study before regulating these particles?