ELI5 Natural Gas - why doesn’t the flame from a gas stove ignite the supply line?

ELI5 Explain Like I'm 5: Bite sized answers to stuff you should know about - in a mini podcast

What’s the difference between natural gas, gasoline and crude oil? Why doesn’t the flame from a gas stove ignite the supply line? How is natural gas transported via pipeline if it’s a gas? Why do gas pipelines have bendy sections? How come we see clean air natural gas buses, but not really any natural gas cars?

... we explain like I'm five

Thank you to the r/explainlikeimfive community and in particular the following users whose questions and comments formed the basis of this discussion: cheetahs_never_win, cerebralaccountant, darkalman, Badcat7, hezec, bigflagellum, evr-, individual-manner-27, loydhenderson, diamondicens and gazzaggerty

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