Asian News International: A new research has indicated that climate change is depriving coral reefs across the globe of the building materials used to make their shells. The daily life of corals is a constant battle against erosion. The reef builders patch up holes in their shells, left by nibbling sea creatures, using a mineral called calcium carbonate. To keep up with repairs, corals in the wild usually require three times as much of the mineral as sheltered corals grown in laboratories. Before …