Photochemical Smog ____

question 20

Multiple Choice

Photochemical smog ____.

• A) only forms at night
• B) requires the presence of fog
• C) requires the presence of smoke
• D) requires ultraviolet radiation

---

Definitions:

Mucus Streaming

The movement or flow of mucus, typically in the respiratory tract, as a defense mechanism against irritants or infections.

Pandemic

An epidemic that has spread over a large geographical area, affecting a significant portion of the population.

Tuberculosis

A bacterial infection primarily affecting the lungs and causing long-term cough, fever, and weight loss.

Chronic Bronchitis

A long-term inflammation of the bronchi in the lungs, characterized by coughing and difficulty breathing.