London smog is found in

Options

A. Summer during day time
B. Summer during morning time
C. Winter during morning time
D. Summer during day time

Answer

**Step-by-Step Solution:**

1. **Understanding London Smog**: London Smog refers to a severe air pollution event that occurred in London, particularly noted during the Great Smog of 1952. It was characterized by a thick fog mixed with smoke and pollutants.

2. **Causes of London Smog**: The primary cause of this smog was the high levels of sulfur dioxide (SO2) released from burning fossil fuels, particularly coal. This gas reacts with moisture in the air to form sulfuric acid, contributing to the smog.

3. **Characteristics of London Smog**: London Smog is also known as "sulphurous smog" due to the significant presence of sulfur dioxide. It is a type of air pollution that is particularly harmful and can lead to respiratory issues and other health problems.

4. **Timing of Occurrence**: The London Smog typically occurs during the winter months, especially in the morning. This is because the conditions are more favorable for the formation of smog during cold weather, when the air is often more stagnant and moisture levels are higher.

5. **Why Winter and Morning?**: In winter, the temperature inversion can trap pollutants close to the ground. The presence of moist air in the morning enhances the formation of acidic aerosols, which are responsible for the dense fog and smog conditions.

6. **Conclusion**: Therefore, the answer to the question "London smog is found in" is that it is found in winter, particularly during the morning hours.

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