All life — whether on land or in the sea — depends on the oceans for two things - Oxygen. Most of Earth’s oxygen is produced by phytoplankton in the sea. These humble, one-celled organisms, rather than the spectacular rain forests, are the true lungs of the planet - and Climate Control. Our climate is regulated by the ocean’s currents, winds, and water-cycle activity. Alannah Mitchell’s new book, Sea Sick: The Global Ocean in Crisis is the first to examine the current state of the world’s oceans — the great unexamined ecological crisis of the planet — and the fact that we are altering everything about them; temperature, salinity, acidity, ice cover, volume, circulation, and, of course, the life within them. Lisa Paul speaks with the author.

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