Reviews: (1) the key concerns and challenges associated with airports' current operations and future growth -- particularly concerns about aircraft noise, water quality, and air pollutant emissions -- and the actions being taken by the nation's busiest airports to balance environmental concerns with such operations and growth; and (2) the actions taken by the FAA and other Federal agencies to address environmental concerns associated with airports' current operations and future growth. Contains recomm. to the DoT and the EPA to further assist airports as they attempt to balance their operations and growth with the impact of their activities on the environment. Charts, tables, and photos.