Lead poisoning, it used to be popular for plates and cups cuz it made the food taste better (because the lead leached in and lead has a sweet taste), then later indoor plumbing (sometimes with lead pipes) became common like a decade prior to the founding of the Republican party in the 1850s. We didn’t get leaded gas until the 1920s

Anyone considered getting rid of leaded avgas yet?

Or testing food for lead more stringently?

Like they had children suffering from lead toxicity recently from contaminated applesauce packages and it takes a fuckton of lead to cause toxicity.