Conservatives answer this (you may be too young)? You may have to go to other sites.?

Why were catalytic converters and emissions testing mandated in the late 1970 through the present? And what effect more than twenty years of fighting to keep air clean have now? Have you look at the anti-pollution act of the early 80's? You (and that include you ASKER) should prepare more before answering with nonsensical rhetoric. and did you know that the molecule that destroys the Ozone layer last from twenty to thirty five years?