_______________ is a naturally occurring substance that is potentially toxic to people.

Question

Quizplus · Accepted Answer

Radon is a naturally occurring radioactive gas that can seep into buildings from soil or groundwater sources. Prolonged exposure to high levels of radon can increase the risk of lung cancer. DDE, PCBs, and BPA are man-made chemicals that can be toxic, but they are not naturally occurring substances. Carbon dioxide is a naturally occurring gas that is not toxic at typical atmospheric concentrations.

_______________ Is a Naturally Occurring Substance That Is Potentially Toxic