What does exhaust HC mean?

[Norah]

Exhaust HC refers to the hydrocarbon compounds in vehicle exhaust emissions, which are harmful pollutants. Among the vehicle exhaust emissions, HC, CO, and NO are all pollutants that have significant environmental impacts. HC is the abbreviation for hydrocarbons, which are produced during the combustion of gasoline and diesel. Vehicle exhaust contains many harmful substances, such as solid suspended particles, nitric oxide, hydrocarbons, lead, and nitrogen oxides, all of which pose direct hazards to human health. In addition to directly harming human health, exhaust emissions also have profound effects on the environment. Sulfur dioxide in exhaust has a strong irritating odor and, when reaching certain concentrations, can easily lead to acid rain, causing soil and water sources to acidify and affecting the growth of crops and forests.