Differentiate between primary pollutants and secondary pollutants.

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(N/A)
Primary PollutantSecondary Pollutant
$(1)$ These pollutants are emitted directly into the environment from a source.$(1)$ These pollutants are formed through the interaction of primary pollutants with other atmospheric constituents.
$(2)$ They persist in the same form in which they are released into the environment.$(2)$ They are typically formed through photochemical reactions in the atmosphere.
$(3)$ They are generally less potent than secondary pollutants.$(3)$ They are often more potent than primary pollutants due to synergistic effects.

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