So, we ship the coal to China and they burn it so dirty that we end up with MORE mercury in our general environment here.
Case in point - some lakes near me that had heavy mercury contamination from back in the 40’ and 50’s are safe enough now to eat fish from — occasionally. But some formerly very clean lakes (including, ironically, a cooling lake at a modern coal plant!) are now also dubbed safe for only occasional fish consumption. So we’ve fixed our hot spots, but the general level of mercury is higher. My local fisheries biologist says that general level is mostly drifting here from “Asia”.
I still view all lakes are “farmed fishing areas”, and only eat wild caught* fish, as if even those are safe, which they likely aren’t, given that the sea isd pretty much a sewer for dumping so much sewage etc into, for decedes.