Arsenic was used as an early insecticide against boll weevels in cotton fields and for various pests in other crops. Rice plants pull that arsenic out of the s

Arsenic was used as an early insecticide against boll weevels in cotton fields and for various pests in other crops. Rice plants pull that arsenic out of the soil when grown on land where arsenic was used in the past. https://www.wired.com/2012/06/arsenic-pesticides-in-our-food/ https://www.wired.com/2012/06/arsenic-pesticides-in-our-food...