The U.S. Environmental Protection Agency's 12-minute documentary, science to protect the air to breathe we, tells the story of air pollution in the United States and the important discoveries of EPA researchers and staff that the information necessary to reduce and control air pollution available made. EPA research repeatedly draw new challenges to air quality, including mixtures of different sources and climate change. For more information on EPA air research, go towww.epa.gov / airscience

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