Oceans are our life blood. They cover 71 percent of the Earth's surface and provide half of our oxygen, much of our food and regulate climate, and are a vital source of income and livelihoods in Pacific Island countries. But our oceans are at risk. They have been hurt by overfishing, pollution and climate change, and 85 per cent of the world's fisheries are now depleted or worse. In February, World Bank President Robert Zoellick called for a huge coordinated global initiative, an SOS to "Save Our Seas". This is a discussion about marine conservation and development - part of the Praxis Discussion Series 2012.