1. Carbon Monoxide (CO):
* Formation: Incomplete combustion of carbon-based fuels (like gasoline, wood, coal) releases CO. This happens when there isn't enough oxygen to burn the fuel completely.
* Poisonous Effect: CO binds to hemoglobin in red blood cells, preventing oxygen from being transported throughout the body. This can lead to suffocation and death.
2. Sulfur Dioxide (SO2):
* Formation: Burning fuels containing sulfur (like coal) releases SO2 into the atmosphere.
* Poisonous Effect: SO2 irritates the respiratory system, causing breathing difficulties and potentially leading to asthma attacks. It also contributes to acid rain.
3. Nitrogen Oxides (NOx):
* Formation: High-temperature combustion processes, especially in internal combustion engines, cause nitrogen in the air to react with oxygen, forming NOx.
* Poisonous Effect: NOx can contribute to smog and acid rain. They also damage the respiratory system, causing lung inflammation and respiratory illnesses.
4. Particulate Matter (PM):
* Formation: Burning fuels releases tiny particles of soot, dust, and other substances, collectively called PM.
* Poisonous Effect: Fine PM (PM2.5) can penetrate deep into the lungs, causing respiratory problems, heart disease, and even cancer.
5. Volatile Organic Compounds (VOCs):
* Formation: Incomplete combustion of fuels can release VOCs, which are organic compounds that evaporate easily at room temperature.
* Poisonous Effect: Some VOCs are carcinogenic (cancer-causing). They also contribute to smog formation.
How they mix with air:
These gases released from burning fuels mix with air through diffusion. The molecules of the released gas spread out and become evenly distributed throughout the air. This mixing process can be influenced by factors like wind, temperature, and air pressure.
Important Note: The amount of poisonous substances produced by burning fuels varies depending on the type of fuel, the efficiency of the combustion process, and the presence of other substances in the air.
