Teams found a variety of items, including car tires, aluminum cans, plastic bottles, radios and even pieces of boats.
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The underwater project started in May with a team of scuba divers led by the non-profit Clean up the Lake making their way around its 72-mile perimeter.
After 25 days of diving, they've already collected more than 8,000 pounds of trash.
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Lake Tahoe is the largest freshwater lake in North America.
It trails only the five Great Lakes as the largest by volume in the United States.