The world’s oceans play an important role in counteracting the greenhouse effect: They are the biggest producer of oxygen (via plankton) and the biggest carbon sink (carbon is dissolved in water) on the planet. Of the 7 billion tons of carbon dioxide produced by human activity every year, the seas absorb 2 billion. They also interact with the atmosphere, a process that governs currents, winds, clouds, and climate. Rich i fish, geological resources (oil and minerals at great depths), and energy (ocean currents and tides), as long as the seas are in good health they are utterly vital to human beings.
-Abrams, “365 Ways To Save The Earth”, 2008