Air Pollution Control Equipment - "An air pollution control equipment manufacturers directory including dust collectors, thermal oxidizers, electrostatic precipitators, air scrubbers, odor control systems, air pollution control systems, air pollution control system....."

Air & Waste Management Association - "A nonprofit, nonpartisan professional organization that provides training, information, and networking opportunities to thousands of  environmental professionals in 65 countries."

American Lung Association State of the Air - "The mission of the American Lung Association is to prevent lung disease and promote lung health."

Atmospheric Turbulence and Diffusion Division - "main function is to perform air quality-related research directed toward issues of national and global importance."

Canadian National Pollutant Release Inventory - "The NPRI collects information on releases and transfers of pollutants from more than 2500 facilities across Canada."

The Center for Environmental Study - The Center for Environmental Study, a 501(c)(3) organization founded in 1969 and located at Grand Rapids Community College, serves its community as an independent, science-based environmental education and research authority.

Clean Air Council - Clean Air Council is a non-profit environmental education and advocacy organization working statewide in Pennsylvania.

Environmental Expert.com - "Environmental Business Information Center for Professionals Worldwide."

The Greater Newark Conservancy - the Greater Newark Conservancy's mission is to educate, train and support communities in creating environmentally safe neighborhoods through grassroots education and training, community organizing, preservation, and improvement of open space, revitalization and beautification, job training and economic development.

Fuel Efficiency Automobile Test - "Includes emissions data collected to date in 21 countries around the world and in more than 25 US locations."

Índice de Sima - Mexian source of information.

Organizations and Projects concerned with Air Pollution - Organizations and Projects concerned with Air Pollution directory.

Ozone Transport Commission - Interstate cooperation organization.

Public Interest Research Groups (PIRG) - Non-profit consumer, enviro, & good government advocacy. Started by students in the 1970`s. Wide range of issues.

Scientific Software Group - "Lakes environmental air pollution modeling software."

U.S. Governmental Protection Agency - Federal Agency's Air Now page with information on air quality.