What does exhaust NO mean?

[StBrody]

NO in exhaust stands for nitrogen oxide. Below is an introduction to vehicle exhaust-related content: 1. Planning: Vehicle exhaust emission standards are quality requirements established to reduce harmful gas emissions, prompting automobile manufacturers to improve technology and control the emissions of harmful substances such as carbon monoxide, hydrocarbons, nitrogen oxides, and particulates. Both Europe and the United States have formulated relevant standards, while mainland China primarily adopts European standards. 2. Air pollution: Vehicle exhaust is another major factor in air pollution. It contains carbon monoxide, nitrogen oxides, and other solid particles that adversely affect human health, especially leaded gasoline, which poses greater harm to humans. Different vehicles also emit different odors. Automotive repair experts note that normal exhaust should be colorless and odorless, while exhaust of different colors and smells may indicate that the vehicle is experiencing some malfunctions.