Question

question 23 what greenhouse gas currently increasing in its percentage in the atmosphere is of particular concern because it is so potent? methane ozone nitrogen carbon dioxide

Explanation:

Methane is a potent greenhouse gas. It has a high global - warming potential and its atmospheric concentration is increasing. Ozone in the troposphere is a greenhouse gas but not increasing as a major concern compared to methane. Nitrogen is not a greenhouse gas. Carbon - dioxide is a major greenhouse gas but less potent than methane molecule - for - molecule.

Answer:

A. Methane