Researchers have developed more advanced tools to measure and model fine
particles. The models enable researchers to estimate how much PM will travel from a source
of potentially toxic particles to populations that can be affected and to predict how reductions
in PM emissions can impact exposure miles away. New, specialized measurement techniques
should help us measure the particle size and composition of diverse kinds of PM and PM
from unconventional sources.
EPA's AirNow Web site provides comprehensive information and an important monitoring tool that allows users to learn more about health effects that occur as a result of exposure to particle pollution.
