A temperature inversion around a large city such as Los Angeles traps pollutants in:
cold air near the ground. warm air near the ground. warm air high above the city. cold air high above the city.
A temperature inversion around a large city such as Los Angeles traps pollutants in cold air near the ground. During a temperature inversion, a layer of warm air sits above cooler air at the surface, preventing the cooler air (and the pollutants within it) from rising and dispersing.