Blue Worlds - The Pacific Ocean

The Pacific Ocean is the biggest and deepest of the world's oceans, covering almost a third of Earth's surface. Over 25,000 islands are dotted across its waters while, in the west, the huge Great Barrier Reef provides a home for some of Earth's most unique wildlife. Below the waves, the Pacific's active sea floor has created thousands of volcanoes, many of which are still active today. But like all the oceans, the mighty Pacific is at risk from climate change, pollution and marine industry. The oceans make up Earth's biggest habitat. More than 70 per cent of Earth's surface is covered by oceans and seas and they hold more than 97 per cent of Earth's water supply. Oceans drive the world's weather, provide half of the oxygen we breathe and provide food and livelihoods for more than a billion people. Blue Worlds explores each of the world's five oceans and major seas in detail, looking at the different features - from wildlife and weather to landscape - that make them all individual and unique. It also looks at the threats that they face, such as global warming, overfishing and pollution.