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https://creativecommons.org/publicdomain/zero/1.0/https://www.rawpixel.com/image/8770558

Red Light of the Exhaust Analyzer Indicates That This Car Failed the Test at the Auto Emission Inspection Station at Norwood Ohio. A Red Light Will Glow If Either the Carbon Monoxide Or Hydrocarbon Emissions Are Above the Maximum Limits for a Particular Model Year. The Car Owner Will Be Given a 30-Day Sticker to Have His Auto Repaired and Be Returned for Retesting.

If the Vehicle Is Not Certified Within That Time, It Can Be Ticketed by the Police 09/1975. Photographer: Eiler, Lyntha Scott. Original public domain image from Flickr

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Red Light of the Exhaust Analyzer Indicates That This Car Failed the Test at the Auto Emission Inspection Station at Norwood Ohio. A Red Light Will Glow If Either the Carbon Monoxide Or Hydrocarbon Emissions Are Above the Maximum Limits for a Particular Model Year. The Car Owner Will Be Given a 30-Day Sticker to Have His Auto Repaired and Be Returned for Retesting.

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