Litter isn’t only a problem on land—it’s also found deep in the ocean. Despite an international treaty banning waste disposal at sea, trash from illegal dumping, commercial fishing, and maritime accidents has accumulated on the ocean floor. Now scientists have analyzed thousands of photographs of a swath of the bottom of the Arctic Ocean taken between 2002 and 2014 and calculated changes in marine litter over time. The results are troubling: The litter has become 4 times denser since 2004, and in one place its density has shot up 23-fold.
By16 February 2017