acid rain changes the ph of water
acid_rain is not air_pollution. acid_rain is air_pollution. acid_rain is not rain. acid_rain is not form_of_pollution. acid_rain is not serious_form_of_pollution. acid_rain is not acid_precipitation. acid_rain is form_of_pollution. acid_rain is rain. acid_rain is serious_form_of_pollution. acid_rain is acid_precipitation.