Reviews the key environmental concerns & challenges associated with airports' current operations & future growth & the efforts of major airports & Fed. agencies to address those challenges. Provides a detailed analysis to the survey received from officials at each of the nation's 50 busiest commercial service airports. Noise, water, & air quality issues are the primary environmental concerns & challenges facing airports now & for the foreseeable future. Other issues were wetlands, endangered species, environmental justice, & historical preservation. Also provides insights into the Fed. effort to help airports address their impact on the environ. Charts & tables.