Question

a temperature inversion forms when warm air forms a \cap\ on top of the cold air below it. which pollutant often gets \stuck\ below a temperature inversion?
tropospheric (ground level) ozone
hydrogen gas

Explanation:

Temperature inversions trap near-surface air pollutants. Ground-level ozone forms from emissions near the ground and cannot rise past the warm air cap, becoming trapped. Hydrogen gas is not a common pollutant trapped in this way.

Answer:

tropospheric (ground level) ozone