According to treehugger.com, we're talking "green" more. Well, it's far from scientific, but according to Google, we're just not:

"green" is blue
"carbon footprint" is orange
"environment" is red 

http://www.google.com/insights/search/#q=%22green%22%2C%22carbon%20footprint%22%2Cenvironment&cmpt=q

As environmental policy is potentially re-shaped in 2009 by Obama and his team, it'll be interesting to see if this changes much.