> Arsenic occurs naturally in many places. Would you mind me burrying a few gallons of it in your backyard? You'll know where it is, so you don't have to worry

> Arsenic occurs naturally in many places. Would you mind me burrying a few gallons of it in your backyard? You'll know where it is, so you don't have to worry about it. In concrete casks, buried 500 meters deep in bedrock, sure.