redOrbit: The remainder of the world’s coral is in danger of being eliminated as a result of human activities, pollution and over-fishing, according to an international report. Released on Wednesday, the “Status of Coral Reefs of the World: 2008” found that one fifth of the Earth’s coral reefs have disappeared since 1950, and the remainder could die off over the next 20 to 40 years unless initiatives to curb greenhouse gas emissions are enforced. “Climate change must be limited to the …