I made an offer on a building lot once. It was besides a peaceful meandering river, with nice nature. It didn't even occur to me that the site might be polluted

I made an offer on a building lot once. It was besides a peaceful meandering river, with nice nature. It didn't even occur to me that the site might be polluted. Eventually it was revealed to me that around a hundred years ago, it was a mechanical shop and the ground was contaminated with heavy metals.