"It" is his Hydrogen Generating Module, or H2N-Gen for short.
Smaller than a DVD player - small enough to sit comfortably under the hood of any truck or car - it could be big enough to solve the world's greenhouse gas emission problems, at least for the near future. In fact, it could make the Kyoto protocol obsolete. Basically, the H2N-Gen contains a small reservoir of distilled water and other chemicals such as potassium hydroxide. A current is run from the car battery through the liquid. This process of electrolysis creates hydrogen and oxygen gases which are then fed into the engine's intake manifold where they mix with the gasoline vapours.
It's a scientific fact that adding hydrogen to a combustion chamber will cause a cleaner burn. The challenge has always been to find a way to get the hydrogen gas into the combustion chamber in a safe, reliable and cost-effective way.
Williams claims he has achieved this with his H2N-Gen. His product, he said, produces a more complete burn, greatly increasing efficiency and reducing fuel consumption by 10 to 40 per cent - and pollutants by up to 100 per cent. [more]