The world’s oceans and coasts – the Blue World – are the cornucopia for humanity. They provide us with food, oxygen and livelihoods. Most of the world’s international trade travels by sea. Sea floors yield important minerals, sand and gravel. Technology is beginning to tap new sources of energy from ocean tides, waves and wind. Coastal habitats provide firewood, fibres and other resources, are natural carbon sinks and protect from storms and surges. Ocean views have been shown to improve people’s wellbeing and are an important reason homes near the sea have higher value. Tourism that relies on clean beaches, safe water and abundant marine wildlife provides many ocean communities with jobs, income and foreign exchange. Ocean recreation offers both market and non-market benefits to residents and visitors of the coasts.