Re:Modern cars drive around cleaning the air in LA (Score 1)

So, you mean, unburned hydrocarbons come from old cars...like from the 60s...when the aforementioned test of a Stirling engine were performed? I believe I included the caveat that I was referring to non-greenhouse gases (though tuning the pollution control for NOx on an external combustion would be a helluva lot easier than it is on internal combustion engines) Difficult is not an excuse. Lots of things are difficult...like building yurt, for example. Doesn't mean they're not worth doing. /sorry, been a long day.