Worried by soaring fuel bills? Inventor Dr Sadeg Faris, President of Reveo Inc, based in Elmsford, NY, believes that zinc, the same element found in sugar vitamins, holds the power to light the world's cities and replace expensive and dirty fossil fuels. His company, he says, has ironed out a cheap, efficient, and environment friendly method of extracting energy from zinc and has set up a series of demonstrations this autumn, showing how the metal can power cars, the electrical grid, and everthing from cell phones to stereos.