Ocean impact map reveals human reach global

Scientific American reports that marine ecologist Ben Halpern of the University of California and an international team of colleagues have mapped areas affected by mankind, with the intention of limiting the impact.

"It's definitely serving as a wake-up call to really start paying more attention to what we're doing to the oceans," Halpern says. "I hope people step up to the plate, knowing they have the opportunity to make a difference."