How To Restore a Dying Reef

Caribbean researchers buy time for endangered marine life by rebuilding with hardy corals.

The world’s reef systems face unprecedented stresses, under threat from overfishing, pollution and climate change. Most threatened is the Caribbean reef system, with more than 80 percent of its live coral cover disappearing since the 1970s, largely due to global warming. A visual example of this toll is called coral bleaching, which turns the animals a ghostly white — the result of warmer waters expelling the algae that give coral its color and sustenance.  An innovative project...

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