The big secret is that water (H2O) can be turned into a powerful fuel (with a very similar formula, HHO) through an easy process called electrolysis. This resulting gas is rich in hydrogen that your engine can use as a clean fuel.

When HHO gas gets into your engine’s chamber it decomposes so that half of the hydrogen atoms burn together and the other hydrogen-oxygen atoms recombine to form clean oxygen that’s released into the atmosphere and water.