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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?

The Netherlands with over 9,000 miles of bike paths, more than any other country in the world is widely heralded as the bicycle capital of Europe. Train passengers are allowed to bring their bikes on board. Thanks to such policies, about one-third of the trips in the Netherlands are on bicycles.