The fuel does not burn and the fuel is not toxic. The fuel is a combination of saltwater, metal salts and other ingredients undisclosed by the company producing it.
Nanoflowcell AG and German company Quant have developed the e-Sportlimousine. Receiving approval for European roads, the e-Sportlimousine has 920 horsepower, goes 0-62 mph in 2.8 seconds and has a top speed of 217.5 mph. It can run for more than 373 miles on a full tank of salt water.
The battery in use is a type of flow battery, which functions by holding two liquids in two seperate tanks and allows them to interact through a membrane producing an ionic charge. The resulting energy is used to power the four motors.
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*Also see http://www.autoevolution.com/news/quant-e-sportlimousine-gets-approved-for-european-roads-85995.html
See video here http://youtu.be/nzrKZcbaMwA
Learn more here http://www.nanoflowcell.com/en