I recall driving through an area in the midwest/west and being told that the “sand dunes” that surrounded us were actually natural asbestos dunes. It was so dusty the car was leaving a contrail.
There is a region in Africa where the dust is made of volcanic glass particles. Walking barefoot in the dust turns you feet into giant warts.
Oh, and 7/10 of the planet is covered with a deadly liquid that kills you by suffocation.
Ahh yes, DHMO, I've heard of that stuff....Nasty.