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by narrator 1252 days ago
There are other ways besides biology that hydrocarbons can be produced. Pure water placed between diamond anvils at high temperature and enormous pressure will spontaneously produce hydrocarbons. Titan's atmosphere is mostly hydrocarbons that didn't come from living things.

"Diamond dissolution and the production of methane and other carbon-bearing species in hydrothermal diamond-anvil cells" https://www.sciencedirect.com/science/article/abs/pii/S00167...