Health problems related to air pollution include

Options

A. lung cancer
B. asthma
C. bronchitis
D. all of these.

Answer

### Step-by-Step Solution:

1. **Identify Health Problems Related to Air Pollution**:
The question asks for health problems that are linked to air pollution. Some common health issues include lung cancer, asthma, and bronchitis.

2. **Explain Lung Cancer**:
Lung cancer is a type of cancer that starts in the lungs. It occurs when normal lung cells begin to grow uncontrollably, forming a tumor. While smoking is a major cause, air pollution is also a significant contributor to the development of lung cancer.

3. **Describe Asthma**:
Asthma is a respiratory condition characterized by difficulty in breathing. It is often associated with wheezing and is caused by inflammation of the bronchi, which can be triggered by air pollution.

4. **Discuss Bronchitis**:
Bronchitis is the inflammation of the lining of the bronchial tubes, which are responsible for carrying air to and from the lungs. This condition can also be exacerbated by air pollution.

5. **Conclude with the Correct Answer**:
All the mentioned health problems—lung cancer, asthma, and bronchitis—are related to air pollution. Therefore, the correct answer to the question is "all of these."

### Final Answer:
Health problems related to air pollution include lung cancer, asthma, bronchitis, and all of these.

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