Aviation contributes a modest but growing proportion of total U.S. emissions, and these emissions contribute to adverse health and environmental effects. Aircraft and airport operations, including those of service and passenger vehicles, emit ozone and other substances that contribute to local air pollution, as well as carbon dioxide and other greenhouse gases that contribute to climate change. EPA estimates that aviation emissions account for less than 1 percent of local air pollution nation-wide and about 2.7 percent of U.S. greenhouse gas emissions, but these emissions are expected to grow as air traffic increases.
升空!航太科學大揭密
Aeronautic Pathfinders: Celebrating Thirty-Three Years of Honoring Aeronautic and Space Pioneers with the Howard Hughes Memorial Award of the Aero...
Damn If They Ain't Flew!: Aviation/Aerospace Anecdotes: People, Places, and Events
A Quarter Century of Aeronautics Pioneers: Celebrating 25 Years of Honoring California Aeronautics Trailblazers with the Howard Hughes Memorial Award...
Pilot Robert E. Ellis and his flight mechanic , Frank Hatcher , with Alaska - Washington Airways Vega , Taku , NC 102W , in which they made two flights in 1930 to Bristol Bay from their base in Juneau , stopping over in Cordova .
A Portuguese Air Force P - 39 Airacobra A B - 25C Mitchell of the 487th Bomb Squadron. 306 Despite this blow to the P - 39's operational career , American production and use continued uninterrupted , with increasingly heavy weaponry and ...
Aerospace and Development: A Survey
... P.E., Environmental Engineer with GS&P; Jill N. Lukehart, Environmental Scientist with GS&P; Devon E. Seal, P.E., ... International Airport • Theodore Francis Green Memorial State Airport • Toronto Pearson International Airport The ...
In the Air
Richard Pearse, Jean Batten, Will Scotland, Fred Ladd, George Bolt, Bert Mercer, Harry Wigley, Pam Collings.