The US EPA's Office of Air Quality Planning and Standards' essential mission is to develop strategies for cleaning dirty air and keeping clean air from becoming dirty. Toxic air pollutants are poisonous substances in the air that come from natural sources or manmade sources and can harm the environment or your health. Inhaling toxic air pollutants can increase your chances of experiencing health problems. Visibility impairment is the result of particles of pollution in the air. It is a complex problem relating to many different pollutants.
Several programs are in place to monitor and patrol pollution that impairs visibility.
In addition, the TTN serves as a public forum for the exchange of technical information and ideas among participants and EPA staff. TTN is where you find all of this information. This site allows regulators, the regulated community, and members of the general public to easily obtain access to both current and historical regulatory information. The OAR Policy and Guidance website should make the task of understanding, implementing and complying with the requirements of the new environmental regulations much easier. Everything from teacher and student education to telecourses that cover air pollution and data management.