Human activities threaten the world's oceans and coastal regions / Anne Platt McGinn --

Human efforts are improving the conditions of the world's oceans and coastal regions / Frank E. Loy --

World's ocean fisheries are seriously threatened / Carl Safina --

Private conservation offers hope for ocean fisheries / Michael De Alessi --

Rising sea levels threaten coastal regions / Don Hinrichsen --

Claims that sea levels are rising are unproven / John L. Daly --

Increased regulation of cruise ship waste is neccessary / Kira Schmidt --

Voluntary efforts to control cruise ship waste are adequate / Ted Thompson --

Ocean fertilization can reduce global warming / Michael Markels, Richard T. Barber --

Ocean fertilization will harm the world's oceans / Sallie W. Chisholm, Paul G. Falkowski, John J. Cullen --

Fully protected marine reserves will promote sustainable fishing / David White --

Fully protected marine reserves do not always promote sustainable fishing / Robert L. Shipp --

Individual fishing quotas will benefit U.S. fisheries / Donald R. Leal --

Individual fishing quotas may not benefit fisheries / Kaitilin Gaffney --

Federal regulation of aquaculture is necessary / Rebecca J. Goldburg --

Alternatives to government regulation will promote the growth of aquaculture / Ferdinand F. Wirth, E. Jane Luzar --

Ban on commercial whaling protects endangered whales / Greenpeace --

Ban on commercial whaling is unnecessary and unfair / William Aron, William Burke, Milton Freeman --

Antisubmarine sonar threatens marine mammals / Nathan LaBudde --

Antisubmarine sonar does not threaten marine mammals / Dennis V. McGinn --

Keeping marine mammals captive in theme parks promotes conservation / George Mannina --

Keeping marine mammals captive in theme parks is cruel / Whale and Dolphin Conservation Society.

What threatens the world's oceans? Human activities threaten the world's oceans / Baha'i International Community ; The threat to the world's oceans can be overcome / Jack Sterne and David Wilmot ; Loss of coral reefs threatens the world's oceans / Peter N. Spotts ; Efforts to protect the world's coral reefs are progressing / Timothy R. E. Keeney ; Overfishing threatens the world's oceans / Ben Carmichael ; The threat posed by overfishing is exaggerated / Jim Hutchinson Jr. ; Runoff pollution threatens the world's oceans / Kenneth R. Weiss ; Acidification threatens the world's oceans / Usha Lee McFarling

What ocean policies are best? Federal regulations are necessary to reduce cruise ship pollution / Sam Farr ; Voluntary efforts are adequate to reduce cruise ship pollution / Michael Crye ; Ocean iron fertilization may reduce global warming's impact / Dan Whaley, Margaret Leinen, and Kevin Whilden ; Ocean iron fertilization will not reduce global warming's impact / Andrew Myers ; The United States should ratify the UN Convention on the Law of the Sea / Benjamin Friedman and Daniel Friedman ; The United States should not ratify the UN Convention on the Law of the Sea / Frank J. Gaffney Jr.

What strategies would best promote sustainable fishing? Aquaculture will fill the gap in the seafood supply / William T. Hogarth ; Aquaculture practices are inefficient / Ken Hinman ; Banning bottom trawling would protect deep sea ecology / Joshua Reichert ; Expecting fishing technologies to have no ecological impact is unreasonable / Nils Stolpe ; Marine reserves will preserve dwindling fish stocks / Bijal P. Trivedi ; Marine reserves will not stop destructive fishing practices / National Coalition for Marine Conservation ; Individual fishing quotas benefit U.S. fisheries / Ronald Bailey ; Individual fishing quotas do not benefit U.S. fisheries / Food & Water Watch

What impact do human activities have on marine mammals? The commercial whaling ban is necessary to protect endangered species / Ben Macintyre ; Whaling can be sustainable when properly managed / Philip Armour ; Antisubmarine sonar harms marine mammals / Dick Russell ; Antisubmarine sonar has adequate safeguards to protect marine mammals / Donald C. Winter ; Keeping marine mammals in captivity is cruel exploitation / Humane Society of the United States ; Keeping marine mammals in captivity promotes conservation / Alliance of Marine Mammal Parks and Aquariums.