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Inside the search for sustainable aviation fuels, which are on the federal chopping block

By Li Qiao, Professor of Aeronautics and Astronautics, Purdue University

The federal spending law passed in early July 2025, often called the One Big Beautiful Bill Act, significantly reduces federal funding for efforts to create renewable or sustainable types of fuel that can power aircraft over long distances while decreasing the damage aviation does to the global climate.

Aviation contributed about 2.5% of global carbon emissions…

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