Look up recorded information of Sparta, including demographics and local economy. Link to all levels of Sparta, government and their sites with services which provide public information. Current economy, business and housing data. Read about up to date current events and what is occurring in the Village of Sparta. Find out about the background of residents and recorded statistics.
background radiation definition. Low-level radiation at the surface of the Earth that comes from cosmic rays and from small amounts of radioactive materials in rocks and the atmosphere. Discover our greatest slideshows.
The highest known level of background radiation affecting a substantial population is in Kerala and Madras States in India where some 140,000 people receive doses which average over 15 millisievert per year from gamma radiation in addition to a similar dose from radon.