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It's possible that the next flight you take could be powered by fuel made from inedible beef tallow. These fuels are better for the environment and have been tested on planes for years, but they are now moving from the experimental phase to commercial production. A new facility in Southern California is now starting fuel production and will supply United Airlines.
Here & Now's Jeremy Hobson talks with Steve Csonka, executive director of the Commercial Aviation Alternative Fuels Initiative, about the challenges of replacing petroleum-based fuels with renewable biofuels.
This segment aired on June 8, 2015.