$**$Question:$**$

In civil engineering, what techniques are commonly employed to monitor and mitigate air pollution arising from industrial facilities, transportation, and urban development?

$**$Choices:$**$

A$)$ The techniques primarily involve regulating seismic activity and volcanic emissions in industrial zones, transportation hubs, and urban areas.

B$)$ They focus on controlling oceanic pollution and marine ecosystems to mitigate air pollution from industrial facilities, transportation, and urban development.

C$)$ Techniques used in civil engineering for monitoring and mitigating air pollution include air quality monitoring stations, emission control technologies, and urban planning strategies.

D$)$ This involves managing the Earth's atmospheric composition and air quality to reduce air pollution from industrial facilities, transportation, and urban development in civil engineering projects.