There are processes for turning biological feedstocks (algae, bio alcohols, or waste from farming or cooking or food processing or even clearing brush or treating wastewater) into combustible kerosene. But those feedstocks are basically highly limited.

There are also processes for turning carbon monoxide or carbon dioxide into synthetic hydrocarbons, without biological feedstocks. These processes are more energy intensive, and hard to scale, but it’s an area of active research.

Basically none of the tech is ready yet. But there are a few different promising pipelines worth exploring.