Guess who voted for this....no, go ahead, I'll wait here....

[ProfessorGAC]

47. The Problems In Louisiana Aren't Necessarily Refining

They are loaded with under-regulated petrochemical plants in abundance.
Petroleum itself is not that volatile, so air emissions are only a modest concern.
But, many petrochemicals are highly volatile, so they get into the air far more readily.
Add to that, there are plants that make halogenated monomers, like vinyl chloride and chloroquine.
Those are still highly volatile and pretty much anything that has "chloro-", "fluoro-" or "halo-" in their names carry substantial cancer & mutagenic risks.
These are also long term environmental concerns as such compounds are highly resistant to biodegradation,biodegradation so they hang around a long, long time.
Louisiana is loaded with such facilities and their regulatory infrastructure is criminally lax.