![]() ![]() However, we know that different engine conditions require different mixtures, so carburetor technology has changed over time to allow the proportional mixing of air and fuel when the engine requires it. ![]() The air required to run an internal combustion engine must flow through the carb in such a way that it draws in just enough fuel for a complete burn. I am not a chemist, so I will not attempt to explain the course of chemical evils, but just remember that more than 99% of pollutant gases are invisible. Raw gasoline practically belches hydrocarbons, which can combine with other gases to create a majority of smog-based health hazards. This is considered by scholars to be the “environmental Magna Carta.” What kick started this year’s movement, was the signing of the National Environmental Policy Act. (Remember, Volkswagens were still new then, so they were in fact mobile! …since no one was using them as chicken coops yet.) The Environmental Protection Agency was also founded this year, along with the holding of the first Earth Day, on April 22nd, 1970. Enter the Clean Air Act of 1970, (1971 model years for us,) which moved far more aggressively to limit emissions of mobile sources. However, the 1967 act did not go far enough, as the public did not feel the pace of improvement was acceptable. It established a framework for defining "air quality control regions" based on meteorological and topographical factors of air pollution. Federal Air Quality Act of 1967 was enacted. ![]()
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