Unit five tobacco lesson to the respiratory system. Five questions in a quick check can someone help

1. What is the main harmful substance in tobacco smoke that damages the respiratory system?

2. How does smoking affect lung function and increase the risk of respiratory diseases such as chronic bronchitis and emphysema?
3. What are some common symptoms of respiratory problems caused by smoking, such as coughing, wheezing, and shortness of breath?
4. What are the potential long-term consequences of smoking on the respiratory system, such as lung cancer and respiratory infections?
5. How can quitting smoking improve respiratory health and reduce the risk of developing serious respiratory diseases?