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  2. California Smog Check Program - Wikipedia

    en.wikipedia.org/wiki/California_Smog_Check_Program

    The program included a biennial and change of ownership testing, "BAR 84" emissions test plus a visual and functional inspection of various emission control components, a $50 repair cost limit (unless emission device tampering was noted), licensing shops to perform smog checks and mechanic certification for emissions repair competence. [18]

  3. Vehicle inspection - Wikipedia

    en.wikipedia.org/wiki/Vehicle_inspection

    An inspection sticker from the Commonwealth of Massachusetts A Warrant of Fitness certificate issued to vehicles in New Zealand. Vehicle inspection is a procedure mandated by national or subnational governments in many countries, in which a vehicle is inspected to ensure that it conforms to regulations governing safety, emissions, or both.

  4. Vehicle emissions control - Wikipedia

    en.wikipedia.org/wiki/Vehicle_emissions_control

    Vehicle emissions control is the study of reducing the emissions produced by motor vehicles, especially internal combustion engines.The primary emissions studied include hydrocarbons, volatile organic compounds, carbon monoxide, carbon dioxide, nitrogen oxides, particulate matter, and sulfur oxides.

  5. The best air purifiers of 2025 - AOL

    www.aol.com/lifestyle/best-air-purifiers...

    During our smoke test, we filled a small room until it had 253 micrograms of PM2.5 per cubic meter. The Core 300 brought it down to four in 15 minutes when placed on the max setting. It may have ...

  6. AOL

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    The search engine that helps you find exactly what you're looking for. Find the most relevant information, video, images, and answers from all across the Web.

  7. Emission standard - Wikipedia

    en.wikipedia.org/wiki/Emission_standard

    The regulation for testing of existing vehicle exhaust gases is Official Newspaper number 30004 published 11 March 2017. An average of 135 g CO 2 /km for LDVs compared well with other countries in 2015, [ 54 ] however unlike the EU [ 55 ] there is no limit on carbon dioxide emissions.

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