Ok this whole mess is something I don't understand, like income taxes. But seems to me they have bigger fish to fry with larger companies "buying credits" to pollute the air. While the little man has to work and literally stay mobile. They would shut one car down, and let all the other millions of cars fogging the planet. The second part of that is, like mentioned is why only part of the states, and or cities? Arkansas used to have it, it is no longer in effect. Now with the rolling date for cars to be exempt? Why are not all ars checked? Just because they are "antique", older cars would be a higher risk of polluting the air, than the newer cars. While that is confusing ill sum it up with this,
It's just another way the government to get into our pocket.