Part one of term paper
is a naturally occurring radioactive element that can be found in soil, underground water, and outdoor air. Some of the properties of this gas include being odorless, tasteless, and colorless. The concentrations vary throughout the country depending on the types of rocks that are found in the soil. Exposure over prolonged periods of time ...

Part two of term paper
... reductions to lower levels may be too difficult or even impossible to achieve.(4) Radon enters buildings through: exposed soil in crawl spaces, through cracks, openings in floors, and through below grade walls and floors. This is the primary source of elevated radon levels in buildings.(5) Outdoor air contains radon, but it is in extremely low concentrations therefore it is not a health hazard. Some wells contain water that has radon dissolved in it. This can be a hazard if the water is agitat ...