Hydrogen cars for the masses one step closer to reality, thanks to invention: 2-in-1 device also uses supercapacitor to

"Hydrogen energy is not 'green' unless it is produced from renewable sources," El-Kady said. He added that using solar cells and abundantly available elements to split water into hydrogen and oxygen has enormous potential for reducing the cost of hydrogen production and that the approach could eventually replace the current method, which relies on fossil fuels.