What is HC in automotive emissions?

[MacFelix]

HC in automotive emissions refers to hydrocarbons, which are produced during the combustion of gasoline and diesel. Automotive emissions include harmful gases such as carbon monoxide (CO), hydrocarbons (HC), nitrogen oxides (NOx), particulate matter (PM), and soot, which are discharged from vehicle exhaust. The release of these pollutants poses a serious threat to human health. The hazards of automotive exhaust emissions: 1. Rapid increase in urban temperatures: Carbon dioxide (CO2), known as a greenhouse gas, enters the atmosphere and contributes to the greenhouse effect, raising temperatures. It also damages the Earth's ozone layer, allowing more sunlight to reach the surface and further accelerating temperature rise; 2. Harm to human health: Nitrogen oxides and lead compounds enter the lungs and bloodstream, severely damaging the respiratory system and causing various diseases, posing risks to people's health; 3. Abnormal global climate, leading to phenomena such as acid rain and black rain, affecting regional climates.