The refugees of the Blue Planet

I just finished watching the movie and was wondering, is all that talk about the sour gas pipelines true? When they put them into a new area do sour gas pipelines pose a risk to people who live near by? Im just askin
One whiff of sour gas will stop your breathing. How many lines carry that gas I'm not sure. I would assume the sulfur is scrubbed out fairly early in it's transport cycle.

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