Human carbon emissions make oceans corrosive - study

WASHINGTON (Reuters) - Carbon dioxide spewed by human activities has made ocean water so acidic that it is eating away at the shells and skeletons of starfish, coral, clams and other sea creatures, scientists said on Thursday.

Marine researchers knew that ocean acidification, as it's called, was occurring in deep water far from land. What they called "truly astonishing" was the appearance of this damaging phenomenon on the Pacific North American continental shelf, stretching from Mexico to Canada.