Finally, we watched the documentary An Inconvenient Truth on TV.
The documentary basically follows Al Gore as he gives a presentation on global warming. I was skeptical about the format as it intersperses Gore’s past (including his childhood and his election loss in 2000) with the lecture on global warming. However, it does humanize the presentation and is probably more effective than just presenting information on climate change by multiple people.
I would highly recommend everyone watch An Inconvenient Truth as it is done well and is about (probably) the most important issue of our times. I rate it 9/10.
If you are interested in information about global warming, I would suggest the list of links compiled by the Real Climate blog, or you could read the reports of the Intergovernmental Panel on Climate Change.