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What are some changes in the sea that have affected us?

My wish: Protect our oceans | Sylvia Earle

July 04

There are several changes we are seeing. One big change is within 50 years, we've taken and eaten more than 90% of the big fish in the sea, nearly half of the coral reefs have disappeared, and there has been a mysterious depletion of oxygen in large areas of the Pacific.

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