We shouldn't be dumping pollution selectively in poor places at all. But it is not coincidence: there is a lot of systematic racism (and other discrimination)

We shouldn't be dumping pollution selectively in poor places at all. But it is not coincidence: there is a lot of systematic racism (and other discrimination) in the world and in the US on top of that, that keeps not-white (and not 'Christian', not het, not male, not English-speaking) people not rich. The variables are not independent. Skin colour is prominent in treating some humans as less than human.