why exactly does it need to be regulated?
safety, taxes, control
why exactly does it need to be regulated?
among other things, to stop the widespread use of mercury to recover gold by amalgamation, and then cooking off the mercury over open fires while the miners breath the fumes and the mercury condenses in the air and then is carried back to earth via rain and is spread across all the land, tons of it permanently contaminating the lands ... plus contamination with cyanide that is also used, which is even worse ...