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The various chemicals emitted in exhaust gasses from an internal combustion engine. The usual gasses which are measured through emissions testing are Nitrogen Oxide (NO2), Carbon Monoxide (CO2), and HydroCarbons (HC).
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How are diesel engines better for the environment than gasoline?
standards as gas, they must be at least comparable to gasoline engines on total emissions. … I'm sure the attention drawn to the Volkswagen emissions scandal is not helping any either. …