Study: Oceans near U.S. in crisis

"...Bringing the oceans' ecosystems back from the edge of collapse -- one recent study found that 90 percent of the world's big fish have disappeared -- requires dramatic, controversial and expensive efforts to limit fishing, coastal development and runoff from cities and farms, according to the Pew Oceans Commission. Its report is the product of a three-year, $5.5 million study...."