GM unveiled an eco friendly Hummer at the LA Autoshow. Rumour has it that the Hummer O2 emits O2 instead of CO2. Eco Geek tells us, "Of course, it doesn't say that 100% of the CO2 is converted and that would probably be an impossible task. But using algae to rapidly convert vehicle exhaust to pure oxygen would certainly be an amazing symbiosis between technology and nature. We're just gonna have to keep our eyes on the LA Auto Show website, and wait with bated breath until December 2nd."