Here Here! Years ago, just before Ford bought Volvo, Volvo came up with a coating that acted as a catalyst that would break up certain harmful compounds as air passed over it. They were going to coat the radiators of their cars with it so it would act as a mobile air filter. I don't know what ever happened to that technology, but when it comes to controlling emissions, few have the auto industry beat for inventiveness.
We need to focus on the larger picture of emissions. Of all the combustion processes we use today, modern automobiles have to be on the cleanest end of the spectrum. With all the development money thrown at cars to reduce emissions, think about the following:
1. Construction equipment: All those bulldozers, steam rollers, back hoes have virtually no emissions control at all. They usually just have a muffler sticking up out of the engine compartment. I walk by a construction site for a skyscraper downtown and every day there is a diesel generator there running with just a pipe sticking out for the exhaust.
2. Lawn equipment: Every week millions of lawnmowers are fired up trim the nation's lawns. I'm going to bet that 98% of those are flatheads with no emissions control at all. Only recently have push behind lawn mowers moved to OHV <I have one> and OHC <Honda of course>. While they still have no emissions control the OHC and OHV engines are at least slightly better than the flatheads.
3. Coal and oil fired power plants: Sure they're cleaner than years ago, but what is that orangy red smoke coming out? Sulfer usually. Just go visit one and look at the stacks... just don't stay too long or they'll call DHS.
4. Old furnaces in poorly insulated houses: Gas is cleaner than oil, but what does it matter if you're heating the neighborhood. Those of you with electric heat don't get a free pass, see item 3.
5. Jetliners: Jetliners have actually become much cleaner in recent years... it's a shame the Airlines haven't updated their fleets much. American and Delta, two of the largest fleets in the US, have average ages of around 13 years old. The fleets sizes are 699 and 434 respectively. The youngest fleet is also one of the smallest. Jetblue has a babyfaced 97 airliners with an average age of 2.8 years. Why is this so important? Jet liners deliver the pollution directly to the upper atmosphere. When 9-11 occurred and all jets were grounded for about a week there was a measurable change in atmospheric pollution.
How about we direct our spite at some of the larger offenders in the pollution problem today?