Acid rain is: caused by gases such as NO2 and SO3 in rainwater any precipitation with a pH less than 7.0 is harmful where buffering materials are present is most harmful where cations such as aluminum and lead are common 25.
(Acid rain; is caused; by gases such as NO2 and SO3 in rainwater) (cations such as aluminum and lead; are; common 25) (any precipitation with a pH less than 7.0; is; harmful) (buffering materials; are; present)
Acid rain cations such as aluminum and lead any precipitation with a pH less than 7.0 buffering materials
is caused are is are
by gases such as NO2 and SO3 in rainwater
common 25
harmful
present