Regarding lead smelters, it's been widely known that such plants were "bad news" for those downwind from them for decades. Well BEFORE any more recent issues were discovered.
One plant, in a less-well-off area of Dallas, TX became a SuperFund clean-up sight about 20 years ago. Children in the neighborhood tested positive to elevated levels of lead in their blood.
Environmental issues didn't start 10 years ago, but decades prior to that. Just that nobody was really paying attention, in some cases, with little oversight or federal physical plant inspections. Interesting how "blind" some inspectors might be when one party is running things, but when those indiscretions are discovered 4 or 8 years later, the "discoverers" become the bad guys instead of the ones who did the indiscretions that have to be cleaned up with taxpayer money. It would have been better to follow the rules to start with, rather than skirting them for a few more cents in corporate dividends each quarter. Cost of compliance is almost always less than the clean-up costs and related fines.
CBODY67