Question: What is the circle of usefulness for poisons?

...Like mercury, which doesn't break down?

Maybe someone is going to reclaim and recycle it?

Dentists, for example, have been recycling gold fillings...for decades. They put them into little medicine vials. There are companies which send a 'buyer' around, then take the old extracted teeth to a central depot for smelting.

They pick up the silver from x-rays, while they're at it.

True...for decades. Tweet