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Yes, our bodies are naturally radioactive, because we eat, drink, and breathe radioactive substances that are naturally present in the environment. These substances are absorbed by our bodies, into our tissues, organs, and bones, and are constantly replenished by ingestion and inhalation. From the radionuclides that are present in our bodies, the average man in the United States receives an effective dose of about 0.3 mSv each year. This is about one-tenth (or 10 percent) of the 3.1-mSv dose that the average U.S. man who weighs 70 kg receives each year from all sources of natural background radiation (not including medical sources). For women and children, the dose is less, in rough proportion to their smaller bodies. More information is available in the National Council on Radiation Protection and Measurements (NCRP) Report 160, Ionizing Radiation Exposure of the Population of the United States. A pie chart in this report shows dose contributions from various natural background radiation sources, and the contribution from our own bodies can be found by adding the dose from potassium-40 and from thorium and uranium and their decay products (discussed in more detail below).
Total dissolved solids (TDS) : comprise inorganic salts and small amounts of organic matter that are dissolved in water. The principal constituents are usually the cations calcium, magnesium, sodium and potassium and the anions carbonate, bicarbonate, chloride, sulphate and, particularly in groundwater, nitrate .TDS is expressed in units of mg per unit volume of water (mg/L) or also referred to as parts per million (ppm) Permissible range of TDS in drinking water: Different government has different regulations for the TDS level. The U.S. EPA sets the maximum contaminant level for TDS 500 ppm where as WHO has different prescribe limits. An aesthetic objective of ≤500 mg/L has been established for total dissolved solids (TDS) in drinking water by WHO. At higher levels, excessive hardness, unpalatability, mineral deposition and corrosion may occur. At low levels, however, TDS contributes to the palatability of water. Most people think of TDS as being an aesthetic factor. In a study by the World Health Organization, a panel of tasters came to the following conclusions about the preferable level of TDS in water:
originally posted by: AgarthaSeed
a reply to: 727Sky
Good to know there's now a database. As far as pollutants, I feel the more we look into our water, air, food, medicine, etc, the more bad news we're gonna find.
The bigger question is: are these pollutants intentionally added to our environment or is it another result of mankind's negligence?