In the comments, Toby points to an interesting YouTube Series on climate change that obviously was excerpted from a British television program. Pointers please.
UPDATE: Paul S. provides the link to a BBC3 series presented by Ian Stewart. The program notes are interesting.
What have you learnt from this series about climate change?
Until a few years ago, I was a bit of a climate sceptic. Geologists are only too aware that the climate is always changing and that our planet has experienced very different conditions in the past – warmer, wetter, drier, and colder; far more carbon dioxide in the air; higher sea levels and the rest.
We geologists are used to these changes happening over non-human timescales – hundreds of thousands to millions of years – so it took me a while to latch on to the notion that it was the rate of change that was important. I was really gob-smacked when I saw the ice cores from Greenland and was able to put my finger on the point in the core when the planet switched out of an ice age and into a warm period over the course of a single season. At most, this fundamental change may occur over one to three years, but it's certainly not five or 10 and it's definitely not the centuries to hundreds that I learned about when I did my geology degree 20 years ago.
What is truly scary about climate change is not any of the specific scenarios of rising seas or melting ice, but the sense that our planet's climate exists on a knife-edge balance and we really don't understand what pushes us over the edge, which makes our great chemistry experiment with the world's oceans and atmosphere all the more short-sighted.