What are the harmful gases emitted by vehicles?

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Mainly include: carbon monoxide, hydrocarbons, nitrogen oxides, sulfur dioxide, smoke particles, and foul odors. Smoke particles contain certain heavy metal compounds, lead compounds, black smoke, and oil mist. The hazards of harmful gases emitted by vehicles are as follows: 1. Excessive emission of harmful gases from vehicles can cause a sharp increase in urban temperatures. Since the harmful gases emitted by vehicles include carbon dioxide, excessive carbon dioxide can lead to the greenhouse effect and damage the ozone layer. After the ozone layer is destroyed, the sun will directly irradiate the Earth's surface, causing temperatures to rise. 2. It can harm human health. After inhaling vehicle exhaust, the human respiratory system can be damaged. 3. It can disrupt the Earth's ecology and climate. In recent years, the emission of harmful gases from vehicles has increased, often leading to phenomena such as acid rain and black rain, which can affect the extinction of organisms.