Carbon tetrachloride? I remember playing with mercury - coating pennies to look like dimes. Melting lead to make fishing sinkers and toy soldiers. Playing with lead toy soldiers (don't recall chewing on them). Living in 150 year old house with lead paint and asbestos. Replacing brake components using air compressor to blow out dust. Both parents smoked Camels when I was young. Washing out my sail boat cabin (mold/dirt) using bleach and laundry detergent (nasty chlorine gas cloud inside). Washing engine parts bare handed with gasoline/kerosene and eventually Varsol. I was going to paint a car with IMRON (but they wouldn't sell it to me - takes full body suit and pumped in air respirator). Remember grinding off pounds of Bondo body filler with no mask. Cutting pressure treated lumber with no mask or gloves - burning left over wood. Cough, wheeze, sniffle.
I could have been a Carl Sagan or Albert Einstein --- save for these mis-steps.