Hydrogen cars are very environmentally friendly because there is very little waste form a hydrogen run car. They do not take gasoline, which is very bad for the environment. Once the hydrogen cell is in place in the car, one only has to add water to make the run. This is great for the environment!
Yes, beyond global warming, hydrogen cars are environmentally friendly, because they are clean. A hydrogen car does not produce the same waste that a car that runs on refined oil produces. Hydrogen cars would also use a new energy that is not currently used. That would allow consumers to use new energy, which would also diversity energy use.