What threatens the world's oceans? Overfishing is hazardous to oceans / Overfishing is no longer a danger to oceans / Carbon emissions cause dangerous ocean acidification / Claims about ocean acidification are overblown and scientifically baseless / Offshore oil drilling endangers oceans / Offshore oil drilling poses no danger to oceans / The extent of the great Pacific garbage patch has been grossly exaggerated / What ocean policies are best? The National Ocean Policy benefits businesses / The National Ocean Policy endangers businesses / Marine protected areas are essential for ensuring ocean biodiversity / Marine protected areas unfairly hamper fishing interests and offer limited environmental benefits / The Clean Water Act can help fight ocean acidification / Three reasons for creating a single ocean health index / What strategies would best promote sustainable fishing? Maximum sustainable yield policies can save fish stock / Maximum sustainable yield policies are problematic / Catch share can help avert fishery collapse / Reports of fishery collapse are exaggerated / Offshore fish farming poses grave risks to the environment / Offshore fish farming offers both environmental risks and benefits / Catch shares do not protect fish or the environment / What impact do human activities have on marine mammals? Deepwater exploratory sonar kills dolphins and whales / Proper guidelines can protect marine mammals from the effects of sonar / Oil spills cause long-term health issues for marine mammals / Salmon from countries that allow fish farmers to kill marine mammals should be boycotted / Hunting of marine mammals needs to be regulated