[PGR88]

The moons of Jupiter have giant lakes of liquid methane and ethane (ie. natural gas)

There’s no dead dinosaurs or eons of built-up plankton there.

[marktwain]

The biggest and best argument that oil, natural gas, and coal were produced from buried and subducted organic deposits is the geologic predictions of where they are found, works, and works well.

All the actual fossils found in coal are another great source of evidence.

Whether their might be some abiotic component in other formations is interesting.

[vpintheak]

Shhhhh….. quit thinking!