All HHO Generators cause engines to produce much lower emissions. The Hydrocarbons are dramatically reduced and the Carbon Monoxide is virtually eliminated (numbers at 0.02% and lower). The tailpipe smell is virtually non-existent on a Gasoline powered engine. What comes out the tailpipe is mostly Hot Water vapor. The heavy soot particles from Diesel engine exhaust falls quickly to the ground, thus vastly reducing their effect as an airborne irritant. That means cleaner air and fewer respiratory problems.

Even today's Gas-Electric Hybrids still pollute the air. The exhaust from the Gasoline still contains Hydrocarbons and Carbon Monoxide and the smell at the tailpipe is still there. There is also the consideration of where the electricity comes from that is used to recharge the batteries. Speaking of batteries, what happens to them after they are no longer serviceable and have to be replaced? Sure, Gas-Electric Hybrids get good mileage, but at what cost?

The fuel source for all HHO Generators is water. Not all of the Hydrogen and Oxygen is used during the combustion, and what's left is discharged out the tail-pipe and back into the air as water vapor.