A big story from the hard science side – the lead of temperature over CO2 in Antarctic ice sheets is not global. CO2 was a key player in the deglaciation.
E360 has a good summary (linked below)
Yale Environment 360: End of Last Ice Age Driven by Surge in CO2, Study Says
There’s a Harvard press release here:
http://www.eurekalert.org/pub_releases/2012-04/hu-ccc040312.php
The Nature paper is here:
http://www.nature.com/nature/journal/v484/n7392/full/nature10915.html