y is CNG considered an environmental friendly fuel??

CNG is considered as environmental friendly fuel because it emits very lesser percentage of all the environment pollutant such as CO2, nitrogen oxide , particulate matters, carbon monoxide, ozone as compared to diesel and petrol. Moreover carcinogens is also produced in very lesser amount as compared to other fuels.

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CNG doesn 't produce a lot of particulate matter (smoke) when it burns. It 's also fairly easy to "scrub" to reduce impurities so it doesn 't make a lot of sulfur oxides that cause acid rain.

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"coz it doesnt leave any residue.non polluting.

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