It is easier to lower the emission of nitrogen oxides from cars than it is to lower the emission of carbon monoxide and hydrocarbons.

Question

Quizplus · Accepted Answer

Reducing nitrogen oxides emissions is often more challenging due to the need for high combustion temperatures, which can increase NOx formation, whereas carbon monoxide and hydrocarbons can be more easily managed with catalytic converters.

It Is Easier to Lower the Emission of Nitrogen Oxides