China wants fish, so Africa goes hungry

Of all the stresses that humans have inflicted on the world’s oceans, including pollution and global warming, industrial fishing ranks high. For years, trawlers capable of scouring the ocean floor, and factory ships trailing driftnets and longlines baited with thousands of hooks, have damaged once-abundant fisheries to the point where, the United Nations says, 90 percent of them are now fully exploited or facing collapse.