What is a primary reason why engine idling poses a problem for air quality?

What is a primary reason why engine idling poses a problem for air quality?

• A. It has no effect on air quality
• B. It helps maintain engine efficiency
• C. It releases pollutants into the air while not in motion
• D. It only affects the air quality of third-world countries

Answer: (C)

Engine idling is a significant concern for air quality primarily because it releases pollutants into the air while the vehicle is not in motion. During idling, an engine continues to burn fuel, which leads to the emission of harmful substances such as carbon dioxide, nitrogen oxides, and particulate matter. These emissions contribute to air pollution and can harm human health and the environment. Additionally, pollutants released during idling can accumulate in the surrounding area, leading to poor air quality and increasing the concentration of smog and other harmful compounds in urban settings. This impact is not limited to any specific region or country; it can affect air quality in both developed and developing nations. Thus, the reason that engine idling is problematic for air quality is rooted in the direct emissions that occur even when the vehicle is stationary.

Engine idling is a significant concern for air quality primarily because it releases pollutants into the air while the vehicle is not in motion. During idling, an engine continues to burn fuel, which leads to the emission of harmful substances such as carbon dioxide, nitrogen oxides, and particulate matter. These emissions contribute to air pollution and can harm human health and the environment.

Additionally, pollutants released during idling can accumulate in the surrounding area, leading to poor air quality and increasing the concentration of smog and other harmful compounds in urban settings. This impact is not limited to any specific region or country; it can affect air quality in both developed and developing nations. Thus, the reason that engine idling is problematic for air quality is rooted in the direct emissions that occur even when the vehicle is stationary.