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Here's a bit more info on the Hummer O2. Oxygen is the key to this concept from the GM Advanced Design that won the LA Auto Show's Design Challenge. It was second straight year the California-based studio captured the honor. Addressing the theme of Environmental Sustainability, the vehicle is called the Hummer O2. The coolest innovation is a phototropic body made of algae-filled panels that produce pure oxygen for the occupants or the outside environment. Designers theorized that such a vehicle