Why are red tides caused and why are they harmful?

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Harmful algal blooms, or HABs, occur when colonies of algaeâ??simple plants that live in the sea and freshwaterâ??grow out of control while producing toxic or harmful effects on people, fish, shellfish, marine mammals, and birds. The human illnesses caused by HABs, though rare, can be debilitating or...
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Harmful algal blooms, or HABs, occur when colonies of algaeâ??simple plants that live in the sea and freshwaterâ??grow out of control while producing toxic or harmful effects on people, fish, shellfish, marine mammals, and birds. The human illnesses caused by HABs, though rare, can be debilitating or even fatal. read less
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