What’s Worse Than an Oil Spill?

Ocean acidification, as a result of CO2 in the atmosphere that is absorbed by ocean, threatens coral reef formations, oysters and other mollusks at the bottom of the food chain, while systemic overfishing by factory fishing fleets threatens to wipe out one of our greatest renewable resources, fish. 
http://opinionator.blogs.nytimes.com/2011/04/19/whats-worse-than-an-oil-spill/?ref=opinion