A Bigger Picture: Global Scale Environmental Challenges

Under the Sea: What's Happening in Our Oceans? Oceans have been the least well-known major component of the Earth's environment. Whilst deep ocean exploration has enabled great advances in understanding the nature of sea floors, we are only recently starting to understand patterns of marine circulation and how these have changed over time. Scientists are also finding increasing evidence of human-induced damage at vast scale - destruction of fish and coral ecosystems, and vast gyrating pools of plastic refuse, for example. What attempts are being made to reduce the footprint of human activity on the oceans, and can they succeed in restoring the largest living space on earth?

Professor Carolyn Roberts is the first Frank Jackson Professor of the Environment at Gresham College. She is also a Senior Scientist at the UK Knowledge Transfer Network (KTN), which links business and universities in order to promote research and innovation in environmental technologies. (from

4. Under the Sea: What's Happening in Our Oceans?

Go to the Course Home or watch other lectures:

1. Scratching the Surface? Looking from Space at Human Impact on Earth
2. Hotting up: Meeting the Challenges of Climate Change in the 21st Century
3. Something in the Air: The Insidious Challenge of Air Pollution
4. Under the Sea: What's Happening in Our Oceans?
5. The Environmental Challenges of Megacities
6. All Must Have Prizes: Citizen Science and the Environment