I pollute the air more when I mow my lawn and my mother's lawn every week than I do in six weeks of commuting. Inspector1, let's keep things in perspective. BTW, do you barbecue?
Seriously, the cost/benefit ratio of automotive emission devices has gone too far to one end. The EPA has done a great job of building their empire within government and have done a remarkable job of reducing tailpipe emissions. Time for them to move on and downsize. Too many idle hands itching for something to do.
95 E320 Cabriolet, 131K