What are the pollutants in vehicle exhaust emissions?
2 Answers
Vehicle exhaust emission standards are based on the China IV standard. The following are the harmful substances in vehicle exhaust and their hazards: Harmful substances in vehicle exhaust: Vehicle exhaust contains hundreds of different compounds, including pollutants such as solid suspended particles, carbon monoxide, carbon dioxide, hydrocarbons, nitrogen oxides, lead, and sulfur oxides. Hazards of vehicle exhaust: While directly harming human health, exhaust emissions also have profound impacts on the environment. Sulfur dioxide in exhaust has a strong irritating odor and, when reaching certain concentrations, can lead to "acid rain," causing soil and water acidification and affecting the growth of crops and forests.
I've found that vehicle exhaust pollutants are truly harmful to the environment. The main culprits include carbon monoxide, which can cause oxygen deprivation and poisoning at high concentrations; nitrogen oxides that form acid rain, damaging trees and lakes; hydrocarbons creating photochemical smog, turning cities into hazy landscapes; particulate matter like fine dust that penetrates lungs, triggering respiratory diseases; and carbon dioxide - while less toxic than others, massive emissions accelerate global warming, leading to more frequent heatwaves and heavy rains. In daily driving, these pollutants accumulate in urban air, creating smoggy days that force people to wear masks outdoors. Personally, I try to reduce short-distance driving by walking or cycling more, and ensure regular engine maintenance for efficient combustion, which can significantly cut emission sources.
