Our oceans - what are they? What does overfishing do? How does photosynthesis work at sea? What could a marginal sea be? We'll also be taking a look at marine plants and animals. And we'll explore some of the challenges and problems our oceans face, and what we can do to make a difference.

Originally released by Kunskapsmedia, 2021. Streaming video file encoded with permission for digital streaming by Infobase on July 07, 2022. Study guide available under Additional info tag.