Which of the following is used to measure and monitor air pollution?

LIDAR uses laser light to scan the air and detect the concentration of pollutants over distance, so it monitors air pollution.

RADAR uses radio waves to track objects and weather, not to measure air pollutants directly.

SONAR uses sound waves under water and is unsuited to air quality work.

SODAR uses sound to profile winds in the atmosphere but is not the standard tool for pollutant levels.

LIDAR builds detailed vertical profiles of aerosols and gases in the atmosphere.

Its remote sensing allows pollution to be mapped without collecting physical samples.