Radon is an odorless, colorless gas that is considered hazardous to health because of its radioactive property. There is a direct link between inhaling radon and lung cancer. In fact, more than 21,000 people die of lung cancer in the US every year, as a result of radon poisoning.
Lead is toxic to human beings and can cause several health effects. Lead is found everywhere, in the soil, air, and water. Even your home is not safe from it. Most people are exposed to lead from fuels like leaded gasoline, lead based paints, and lead from industrial facilities.