What you don't know can and could and might and will kill you. The town of Wittenoom, Australia for example. Know what happened there?

Mining for blue asbestos began there in the 1930's. The deadly danger of asbestos was as yet unknown. People were dying and the town is now declared "A CONTAMINATED SITE". What you don't know is a lot. True of all of us. How much of what we do not know will kill us? We don't that too.