Question #8758
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Which is harm full emission element produced by an internal combustion engine?

A.
Co<sub>2</sub> + Hc + H<sub>2</sub>O
B.
H<sub>2</sub>0 + CO<sub>2</sub> + Nitrogen
C.
CO + HC + NOx
D.
Pb + CO<sub>2</sub> + Nox
Explanation

No explanation provided.