Sea shells used to clean up heavy metals

On the banks of the Saigon River in Vietnam, researchers have just completed tests on a new way to combat water pollution that could save millions of lives in coastal cities throughout the developing world.
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Heavy metals contamination in seawater, sediments and seashells of the Gulf of Suez, Egypt

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How to clean sea shells. My process for getting crusty, grimy sea shells gorgeous again.

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Designers Are Turning Seashells Into Fine Jewelry - The New York Times