Cars now clean enough that household products rival them for air pollution

By [email protected] (John Voelcker) The first major emission controls on motor vehicles were introduced in 1975 with the advent of the catalytic converter. Today’s cars emit less than 1 percent of the three “criteria” pollutants that came out of their tailpipes half a century ago. They emit relatively so little carbon monoxide, nitrogen oxides, and hydrocarbons that the collective…

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