https://www.nytimes.com/2007/09/10/business/worldbusiness/10...
The fact that lead paint is totally banned (here in the US) instead of just banned in paint marketed for use on/in inhabitable structures and allowed with warning labels required is asinine. There's tons of chemicals out there that will screw up kids and adults if they eat them and we don't ban them. We just let the civil court system assign appropriate judgements to anyone dumb enough to use them on things that will come in close enough contact with people to be harmful.
Edit: The stereotypical effect of lead exposure is that it makes people stupid. I hope you people appreciate the irony in the fact that we can't have a serious discussion about the pros and cons of lead paint.
Nobody is going to be "exposed" to a highway overpass or the hull of a ship or some chemical storage tank outside a factory enough for it to measurably affect anyone. Why can't we paint it in lead if that lasts longer for a given price point? There's all sorts of things that are out there in the world that are not interacted with enough to affect anyone in any measurable way (obviously assuming the people who work with the lead paint when wet follow proper procedures).
When you make your living doing a thing it's far more lucrative to do things right than to do them wrong. There's a bunch of incentives business owners who provide services operate within and they generally align to doing things the right way.