AIR QUALITY - The New Brunswick Department of the Environment (Canada)
AIR QUALITY - Energy & Environmental Analysis Group, Los Alamos Nat'l Lab
AIR QUALITY - Fort Collins, Colorado (fcgov.com)
ASMA - Air and Water Quality Monitoring
BURNING ISSUES - Clean Air Revival 
CANTOX - Environmental Inc.
CLEAN AIR MOWING - Environmentally Friendly Lawn Mowers
CLEANINGPRO - Expert 'environmentally-preferred' cleaning solutions to your cleaning problems
COKE SPOTLIGHT - Spotlight on Cokes CFC use
CYBERMARCH - Ozone air pollution monitoring program for students k-12 (in French and English)  
ECOWORLD - Nature & Technology in Harmony
ENCYCLOPEDIA OF ATMOSPHERIC ENVIRONMENT - Atmospehric Research and Information Centre
EPA CPPD - U.S. EPA Climate Protection Partnerships Division
FCAP - Foundation for Clean Air Progress
GARDEN FRESH AIR - Gardeners view on air pollution
GHASP - Galveston Houston Association for Smog Prevention
NESCAUM - Northeast States for Coordinated Air Use Management
NJTAP - New Jersey Technical Assistance Program for the Prevention of Industrial Pollution
POLLUTION ONLINE - Pollution Equipment and Control
POLLUTION PROBE - a Canadian charitable organization
SAGE - Solvents Alternative Guide
STAPPA/ALAPCO - Air Pollution Control