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-GM's latest fuel cell uses energy twice as efficiently as a gas engine. -naturally occurring hydrogen is a tricky substance: Because it’s the smallest and lightest molecule  - it escapes easily through tiny spaces other molecules can’t pass through. So you need heavily armored and very secure storage tanks--in the car and on the ground--as well as aircraft-quality hoses and fittings to fill the tanks. -There are regional and national test projects around the world, using whatever local energy source makes the most sense: Geothermal in Iceland, nuclear in France, natural gas in several places. -that’s the great thing about hydrogen: You can make it a lot of different ways. Just apply electricity to water molecules in a device called an electrolyzer, and two components result: hydrogen and oxygen -GM is especially proud that these highly modified vehicles comply with all 2007 Federal crash and safety regulations and more, including a 50-mph angled side impact directly into the hydrogen tanks--without any leakage. -The fuel-cell Equinox promises a range of 200 miles (320 km) per 4.2-kg tank of hydrogen -Top speed is 100 mph (160 km/h), and GM quotes a 0-to-60-mph time of 12 seconds. -”freeze durable”--which is to say they generate power in less than 15 seconds at temperatures down to –20 degrees Celsius -One vision is that owners top up their car’s hydrogen fuel cells by plugging in the hose of an electrolyzer that connects to the home’s water pipes. It’s mounted on a garage wall and fills the tank with hydrogen in the wee hours, when demand for electricity is lowest, so the price is cheap.

N/A. (2007). //Gm's latest fuel cell//. Retrieved from http://spectrum.ieee.org/energy/renewables/driving-