They always talk about the air pollution that we, (H2) owners are polluting the air. The other day here in Chicago, some dumb as* comes up to me and starts barking about that issue.... so, I then take him over to the driver side of the vehicle and I point to him this sticker on my windshield. The sticker reads that "my vehicle meets all state air pollution and I'm in no violation of any code."
He then walks away with his tail between his legs and moves on.
Here in Chicago, if you own a vehicle for at least 4 years, YOU HAVE to take the vehicle in for a pollution test to make sure it complies. Once it passes, then you don't have to test it for another 4 years. Its called "Air Team"