Question

Which of the following is not a source of air pollution related to human activities?

Option 1: Gasoline
Option 2: Garbage
Option 3: Forest fires
Option 4: Radon

Answer 1

Forest fires are considered a natural source of air pollution and are not directly caused by human activities, making it the correct answer to the question about non-human sources of pollution among the options provided. The correct answer is option C.

Step-by-step explanation:

The question asks which of the following is not a source of air pollution related to human activities. Among the options provided, forest fires are typically considered a natural source of air pollution and are often not directly related to human activities, although human activities can indirectly increase the frequency and intensity of forest fires.

Therefore, option 3, forest fires, is the correct answer. While radon is a natural radioactive gas, it can become a pollutant when it accumulates inside buildings; however, it is not typically classified as a pollutant related to human activities.

On the other hand, gasoline, garbage, and radon mitigation efforts can all be related to human activities and contribute to air pollution.The correct answer is option C.

Answer 2

Radon is a naturally occurring radioactive gas that is not directly associated with human activities. Therefore, the correct answer is Option 4: Radon.

Step-by-step explanation:

Radon is a naturally occurring radioactive gas that is not directly a result of human activities. It is produced from the natural decay of uranium in soil, rock, and water. While radon exposure can pose health risks, particularly in indoor environments, it is not considered a source of air pollution resulting from human activities.

On the other hand, options 1, 2, and 3 are associated with human-induced air pollution:

• 1. Gasoline is a fuel commonly used in vehicles and machinery, and the combustion of gasoline releases pollutants into the air.
• 2. Garbage, when burned or improperly disposed of, can release pollutants and contribute to air pollution.
• 3. Forest fires, although they can occur naturally, are often exacerbated by human activities such as land clearing, arson, or inadequate fire management practices, leading to increased air pollution.

In summary, among the options provided, radon is the only one that is not a source of air pollution directly related to human activities.