Bloomberg: A third of reef-building corals face extinction as global warming adds to other man-made threats including over-fishing and coastal development. A team of 39 researchers assessed the state of 704 coral species and found 32.8 percent are threatened with extinction. The study results, published today in the journal Science, are “worse than expected,” said co-author Suzanne Livingstone, a marine biologist at Old Dominion University in Norfolk, Virginia. “When we began this …