Let’s ignore the fact that the US has become the world’s largest oil exporter under the current administration. full disclosure: not a yank

They asked for tips or best practices, not on subsequent effects.

Then keep your cat indoors and don’t shove your opinions down others throats? Especially when it’s completely irrelevant to what OP is asking

Classic case of US defaultism. OP, your cats will naturally adjust to doing it outdoors, but best to keep a litter box inside too.