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Articles on Oceans 21

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Miami and Miami Beach were built right up to the waterfront, with little room for nature. Shobeir Ansari via Getty Images

A 20-foot sea wall won’t save Miami – how living structures can help protect the coast and keep the paradise vibe

The Army Corps of Engineers is planning a sea wall 6 miles long and flood gates. The infrastructure might protect downtown from a hurricane storm surge, but most of the area will still be vulnerable.
Seabed sediments in Bermuda mangroves consumed nitrous oxide from the seawater. Restoring coastal ecosystems might help curb climate change. (Shutterstock)

Nitrous oxide, a powerful greenhouse gas, is on the rise from ocean dead zones

Nitrous oxide is a potent greenhouse gas, 300 times more powerful than carbon dioxide. Global emissions of N2O are on the rise as a result of human activities — and their impact on ocean ecosystems.
Blue sharks, which are prized for their fins, swimming off Cape Point in South Africa. Morne Hardenberg

South Africa’s plan to protect sharks needs an urgent update

Sharks grow slowly and produce few young compared to bony fishes. In many cases, this means that their populations are fished out faster than can be replenished if not well managed.

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