In the late sixties and early seventies I lived near Buffalo NY (Lackawanna NY had massive steel millls). Approaching from the east you could see a reddish orange sky hanging over Buffalo. If you drove to Chicago, all the signs on I-90 near Gary IN (huge steel mills) were brown and corroded. Los Angeles, in a natural basin, also had a brown haze, even in the ninties, primarily from autos. We once believed that the earth could absorb all the poisons we could dish out, and when the earth's population was less the 1 billion, it worked to a point. Don't get me wrong, I like my power tools, lights, TV, lawn and garden tools, car, etc. We should use our knowledge and engineering/manufacturing abilites to make lighter, more efficient, less polluting engines. I also like to breathe. Your two stroke Lawnboys, probably using a 20 to 1 mix, should be retired. How many Saab 96s (two strokes) do you see on the road? Even back then, we paid extra for high performance 50 to 1 oil for the snowmobiles when a lot of people were running 20 to 1. Short of going to an oil injected brand, that was the best technology in the seventies.
