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Water chestnut was first observed in North America near Concord, Massachusetts in 1859. The exact path for the introduction is unknown. It has been declared a noxious weed in Arizona, Massachusetts, North Carolina and South Carolina and its sale is prohibited in most southern states.
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The Lacey Act is a law which says that you cant bring another species into America.
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Today the Water Chestnut is still taking over the Massachusetts waters and polluting the air.
