Arsenic was used for damn near everything from agriculture to manufacturing until about 100 years ago. It's a very effective pesticide (it kills everything!) an

Arsenic was used for damn near everything from agriculture to manufacturing until about 100 years ago. It's a very effective pesticide (it kills everything!) and there weren't a whole lot of other options back then that actually worked. https://www.chelseagreen.com/2009/the-tangled-history-of-arsenic-and-farming/ https://www.chelseagreen.com/2009/the-tangled-history-of-ars...