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Clean Air World

Welcome to Clean Air World

The National Association of Clean Air Agencies (NACAA, formerly STAPPA/ALAPCO) welcomes you to Clean Air World. Use this web site to learn about air pollution, find the latest news and information on important air topics and link to governmental air pollution control agencies around the world  

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Did You Know?

There are more than 700 million registered vehicles in the world. If we improved the fuel efficiency of vehicles worldwide by 20%, we would save over 700 million tons of CO2 every year.