Associated Press: The world has lost nearly one-fifth of its coral reefs, and much of the rest could be destroyed by increasingly acidic seas if climate change continues unchecked, a conservation group warned Wednesday. Rising temperatures from greenhouses gases are the latest and most serious threats to coral, which are already being damaged by destructive fishing methods and pollution, according to the International Union for Conservation of Nature (IUCN). About 19 percent of coral reefs have …