( Thus ( , ( ( while ( ( the Agency ) ( agrees ( that ( ( elemental carbon ) ( is persistent ) ) ) ) ) ) ( , ( ( the Agency ) ( ( ( would not ) ( conclude ( that ( ( all ( organic substances ) ) ( ( are persistent ) ( simply ( because ( they ( contain carbon ) ) ) ) ) ) ) ) ) . ) ) ) ) ) )
(ROOT (S (ADVP (RB Thus)) (, ,) (SBAR (IN while) (S (NP (DT the) (NNP Agency)) (VP (VBZ agrees) (SBAR (IN that) (S (NP (JJ elemental) (NN carbon)) (VP (VBZ is) (ADJP (JJ persistent)))))))) (, ,) (NP (DT the) (NNP Agency)) (VP (MD would) (RB not) (VP (VB conclude) (SBAR (IN that) (S (NP (DT all) (JJ organic) (NNS substances)) (VP (VBP are) (ADJP (JJ persistent)) (SBAR (ADVP (RB simply)) (IN because) (S (NP (PRP they)) (VP (VBP contain) (NP (NN carbon)))))))))) (. .)))
Thus, while the Agency agrees that elemental carbon is persistent, the Agency would not conclude that all organic substances are persistent simply because they contain carbon.
(ROOT (S (NP (NP (NNP Organic) (NNS substances)) (, ,) (PP (VBG including) (NP (NNS proteins) (, ,) (NNS carbohydrates) (, ,) (CC and) (NNS oils))) (, ,)) (VP (VBP contain) (NP (NN carbon))) (. .)))