Question

which of the following is a major air pollutant?
zinc
copper
carbon dioxide
hydrogen peroxide

Explanation:

Carbon dioxide is a major air pollutant. While zinc and copper are metals and not typically major air pollutants in the context of common air pollution discussions, and hydrogen peroxide is not a major air pollutant. Carbon dioxide is a greenhouse gas and a significant contributor to air - quality issues and climate change.

Answer:

carbon dioxide