Latest Laura Brunson Stories
In the United States and other developed countries, fluoride is often added to drinking water and toothpaste to help strengthen teeth. But too much naturally occurring fluoride can have exactly the opposite effect.
A University of Oklahoma environmental science graduate student will travel to Ethiopia in June to test materials she has been investigating as possible solutions to fluorosisâ€”a widespread problem in the Rift Valley, where high levels of fluoride in the drinking water result in dental and skeletal disease.
- A small wooded valley; a dell.
- The protecting weather-shed built around the entrance to a house.