Why does this matter?Coral reefs occupy less than 1 percent of the sea floor, but they underpin roughly a quarter of all ocean life — not just algae and zooplankton, but countless species along the food chain, from crabs to sea turtles to human beings. Reefs support fishing and tourism and guard against coastal erosion. Half a billion people worldwide depend on coral reefs for food or income.

Source: 3D Printing Could Save Coral Reefs | Popular Science
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