pounds of carbon dioxide emissions per mile based on the average mix of electric power sources during refueling. The Compressed Air Car does produce a lot of potential benefits, but there are just as many drawbacks to this technology.

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Read our privacy and cookie policy for more about what we do with your data, as well as your rights and choices – including how to manage cookies. Early prototypes, however, have traveled distances closer to 120 miles -- good enough for your daily commute, but not quite adequate for longer trips [source: Motavalli]. You do not have to use all the materials, but you cannot use other materials, or more than the maximum allowable quantity. While the 2015 challenge is over, you can still follow the rules and compare your car to the high scores. Left) If the skewer is taped directly to the cardboard body of the car, it cannot rotate, so it does not make a good axle.Heidi Klum reveals behind-the-scenes look of THAT Peacock Halloween costume (which took SIX HOURS to complete!

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With non-renewable energy sources running low, the biggest manufacturers in the world are seeking out alternative fuel sources. Try a modified scoring system that awards points for carrying weights as far as possible, without assigning costs to different materials.Cleaner sources of electricity, such as nuclear power or hydropower, will result in far less pollution. Ethan Tucker pitches Zero Pollution Motors, the US licensee for Luxembourg-based MDI – developer of the Air Car, in Shark Tank episode 626. They have less energy efficiency and range than gas turbines, internal combustion engines or battery vehicles.