For one thing, conference organizers said they would offset about 20,000 tons of carbon associated with the event by buying up carbon offsets from the nonprofit Carbonfund.org.
Some industry watchers consider that a minimal effort. As Green Wombat points out, the cost of $108,000 won't immediately offset the emissions from the 140,000 attendees gridlocking the strip and the electricity -- much of it coal-fired -- the event is using.
With the Federal Trade Commission conducting hearings on its green marketing guidelines, starting with carbon offsets, these efforts under coming under closer scrutiny (see our story in November, Cleaning Up Greenwashing, and a New York Times story published Wednesday).
But in addition to other green nods like biodegradable utensils and recycled carpet in an exhibit hall, the conference added "a green component" this year to provide a stage for companies to showcase their efforts to bring more green to consumers.
Here are a few of the greener gadgets and new technologies that made a splash at the show (click "Next" below the photo to see them all):