> The manganese nodules that I learned about in geoscience classes decades ago are targeted by miners today who will have no qualms about scraping the seafloor

> The manganese nodules that I learned about in geoscience classes decades ago are targeted by miners today who will have no qualms about scraping the seafloor clean This (and the concept of extinction credits) is an opening plot point in the book “Venomous Lumpsucker”, which I found a good read.