Arsenic is a naturally occurring chemical element that can be found in rocks, soil, water, air, and plants. It is a highly toxic substance that can cause serious health effects when ingested or inhaled in high doses. Research in the area of arsenic focuses on understanding its sources, environmental behavior, and health impacts. This includes studying arsenic contamination in groundwater and soil, developing technologies for arsenic removal from drinking water, and investigating the health effects of arsenic exposure. Additionally, researchers are working on methods to assess and regulate arsenic levels in various environmental media to protect human health and the environment.