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Aircraft exhaust emissions --- Airplanes --- Lead --- Fuel --- Environmental aspects
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GAO was asked to determine (1) how the VALE program has been implemented, including airport participation levels, types of projects, and program expenditures, and (2) the outcomes attributable to the VALE program.
Aircraft exhaust emissions --- Aeronautics, Commercial --- Air --- Environmental aspects --- Pollution
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Aircraft exhaust emissions --- Airplanes --- Lead --- Fuel --- Environmental aspects --- Environmental aspects
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GAO was asked to determine (1) how the VALE program has been implemented, including airport participation levels, types of projects, and program expenditures, and (2) the outcomes attributable to the VALE program.
Aircraft exhaust emissions --- Aeronautics, Commercial --- Air --- Environmental aspects --- Pollution
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This testimony addresses (1) the scope and nature of aviation emissions, (2) the status of selected key federal efforts to reduce aviation emissions, and (3) next steps and challenges in reducing aviation emissions.
Aircraft exhaust emissions --- Aeronautics, Commercial --- Air --- Environmental aspects --- Pollution --- United States.
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Aircraft exhaust emissions --- Aeronautics, Commercial --- Air --- Climatic changes --- Environmental aspects --- Pollution --- Government policy --- United States.
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This testimony addresses (1) the scope and nature of aviation emissions, (2) the status of selected key federal efforts to reduce aviation emissions, and (3) next steps and challenges in reducing aviation emissions.
Aircraft exhaust emissions --- Aeronautics, Commercial --- Air --- Environmental aspects --- Pollution --- United States.
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Aircraft exhaust emissions --- Aeronautics, Commercial --- Air --- Climatic changes --- Environmental aspects --- Environmental aspects --- Pollution --- Government policy --- United States.
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