Futurology

They used lead for sure, but there might have been fewer cars depending on where they lived.

Lead is probably one of the least bad things you've inhaled if you lived in a Chinese large or industrial city between 2000 and 2024. So you're likely tainted as well. Sorry.

We all still get mercury from the food because many countries still allow burning waste/garbage in outdated plants without proper smoke cleaning installed. And then it spreads through the atmosphere and gets into the local food cycle when it rains. This effect is global. That's why you shouldn't eat fish from lakes if you're pregnant etc. Doesn't matter where you live.