system
Given the following post, respond as if you're commenting on Reddit:
human
ELI5: what exactly is that "new car smell" and why can't it be duplicated?
gpt
They're various types of petroleum-based solvent used in plastics and vinyls on the inside of the car. For a while they give off a gas that you can smell.

It could be duplicated but it shouldn't be, because it's basically huffing glue. Nothing to worry about in tiny doses but not something you should be actively seeking.