The buzz has died down a lot, but since Jim Purbrick was kind enough to remember our real-vs-second life discussion at EuroFoo in talking about CarbonGoggles I have to write about it. Carbon Goggles are "simulated augmented reality" - which is to say, trading reality for the virtual reality of SL, the world is augmented with carbon emission data, so you can imagine what the world looks like if CO2 emission was visible.