The first controlled automotive emission was ______. A)crankcase vapors B)tailpipe emissions (HC and CO) C)NO _X D)evaporative emissions

Name: The first controlled automotive emission was ______. A)crankcase vapors B)tailpipe emissions (HC and CO) C)NO X D)evaporative emissions
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The first controlled automotive emission was crankcase vapors. This was part of early efforts to reduce air pollution from vehicles by capturing and rerouting vapors that would otherwise escape directly into the atmosphere.

The First Controlled Automotive Emission Was ______