( ( In ( addition ( to ( point ( source emissions ) ) ) ) ) ( , ( ( the ( ISC ( long-term ( concentration model ) ) ) ) ( ( ( considers emissions ) ( from ( volume ( and ( area sources ) ) ) ) ) . ) ) ) )
(ROOT (S (PP (IN In) (NP (NP (NN addition)) (PP (TO to) (NP (NN point) (NN source) (NNS emissions))))) (, ,) (NP (DT the) (NNP ISC) (JJ long-term) (NN concentration) (NN model)) (VP (VBZ considers) (NP (NNS emissions)) (PP (IN from) (NP (NN volume) (CC and) (NN area) (NNS sources)))) (. .)))
In addition to point source emissions, the ISC long-term concentration model considers emissions from volume and area sources.
(ROOT (S (NP (DT The) (NN term) (NN concentration)) (VP (VBZ describes) (NP (NP (DT the) (NN number)) (PP (IN of) (NP (NP (NNS items)) (PP (IN in) (NP (NP (DT a) (VBN given) (NN area)) (CC or) (NP (NN volume)))))))) (. .)))