Now, GM is developing a new hydrogen fuel celled car, like many others are. What makes it special though is that in spite of the fact that they are HHO powered, they still drive like a normal gas engine car, making it be a better experience. General Motors has been working on hydrogen powered cars for a full decade,, but with the last push, they have designed a new clean slate 21st century car that didn't depend pn the old technologies. These hydrogen cars make no emissions, but they do take a lot of emissions to create the actual hydrogen. Although this is still a problem, the blame is switched from the car companies to the manufacturers creating the hydrogen.