Ocean cacophony a torment for sea mammals

With the constant churn of freighter propellers, the percussive thump of oil and gas exploration and the underwater din of military testing, ocean noise levels have become unbearable for some sea mammals.

Poor stream health imperils fish

"There is a direct relationship between land and water use and the imperilment of fishes," said a Virginia Tech researcher. "It is clear that the conservation of our diverse fish fauna and other aquatic resources faces huge ...

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