Fly the Crowded, Polluted Skies

Fly the Crowded, Polluted Skies

Air traffic is expected to top 1 billion passengers in the United States by 2015 as facilities become overburdened and global airline officials try to clean up the industry's act.

The Federal Aviation Administration (FAA) provided the growth estimate Thursday. Passengers in the United States are expected to return to pre-2001 levels this year, the FAA said, with 3.4 percent annual growth expected for the next 12 years.

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