Anyone who’s lived near the ocean, a lake, or a river knows how disgusting polluted water can be. It looks gross, smells bad, and harms the animals living under the surface. Despite our best efforts, cleaning pollution from waterways can be difficult — but one method has the potential to be extremely effective. And get this: it comes from nature. Watch as these oysters clean a tank of dirty water just by filter-feeding. You won’t believe your eyes!
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