jet fuel

About 900 workers currently operate the refinery, which also produces diesel and jet fuel.

But SAFs’ share of the market is tiny, and they’re two to three times as expensive as jet fuel — basically kerosene — from refined oil.

Biofuels also draw criticism from many environmentalists because their supply chain still contributes carbon to the atmosphere, and much of what’s burned today is a mix of SAF and fossil jet fuel.

The aviation industry is under pressure to find an alternative to jet fuel.

They also cost between three and five times as much as "regular" jet fuel.