An international advocate for climate change solutions, David Saunders mostly talks about his life and passion.
But the hour begins with a history of Bristol -- a city on the east coast of England -- which is creating an ocean barrier with electricity generating tubes. (David explains how all that works.)
There is also a description of the political entities in the British Isles. (Here's a diagram to show you the complexities.) And that doesn't even get into the ever-changing gerrymandered "county" boundaries!
You can hear more from David on his channel at https://www.youtube.com/user/ZeroCarbonBristol