I was just listening to CBC radio's science journal, Quirks and Quarks. There was a lot of talk about climate change this week. They interviewed the scientist who came up with Gaia Theory. He now feels that things have gone too far and we are, essentially, fucked.
Here is a link to the Quirks and Quarks archives where you can download a podcast of the episode (as well as previous episodes, it really is an excellent show).
http://www.cbc.ca/quirks/archives/05-06/mar25.html