( ( ( Describes ( the phenomenon ) ) ( from ( ( a ( chemical standpoint ) ) ( emphasizing ( ( the role ) ( of ( ( ( ( ( ( ( ( ( ( sulfuric acid ) , ) chlorofluorocarbons ) , ) ( carbon monoxide ) ) , ) ( carbon dioxide ) ) , ) and ) ( nitric acid ) ) ) ) ) ) ) ) . )
(ROOT (S (VP (VB Describes) (NP (DT the) (NN phenomenon)) (PP (IN from) (NP (NP (DT a) (JJ chemical) (NN standpoint)) (VP (VBG emphasizing) (NP (NP (DT the) (NN role)) (PP (IN of) (NP (NP (JJ sulfuric) (NN acid)) (, ,) (NP (NNS chlorofluorocarbons)) (, ,) (NP (NN carbon) (NN monoxide)) (, ,) (NP (NN carbon) (NN dioxide)) (, ,) (CC and) (NP (JJ nitric) (NN acid))))))))) (. .)))
Describes the phenomenon from a chemical standpoint emphasizing the role of sulfuric acid, chlorofluorocarbons, carbon monoxide, carbon dioxide, and nitric acid.
(ROOT (S (NP (NNP Carbon) (NN dioxide)) (ADVP (RB chemically)) (VP (VBP weather) (NP (NNS rocks)) (PP (IN by) (S (VP (VBG creating) (NP (NNS acids)))))) (. .)))