FAA: Continuous Lower Energy, Emissions, and Noise (CLEEN) Program

The Continuous Lower Energy, Emissions and Noise (CLEEN) Program is the FAA’s principal environmental effort to accelerate the development of new aircraft and engine technologies and advance sustainable alternative jet fuels. Through the CLEEN Program, the FAA is a cost-sharing partner with industry. CLEEN projects develop technologies that will reduce noise, emissions, and fuel burn and enable the aviation industry to expedite integration of these technologies into current and future aircraft. CLEEN is a key element of the NextGen strategy to achieve environmental protection that allows for sustained aviation growth.