claim: Through its impacts on the climate, CO2 presents a danger to public health and welfare, and thus qualifies as an air pollutant
evidence: La Niña (/lɑːˈniːnjə/, Spanish pronunciation: [la ˈniɲa]) is a coupled ocean-atmosphere phenomenon that is the colder counterpart of El Niño, as part of the broader El Niño–Southern Oscillation climate pattern.