( ( As ( ( ( anthropogenic sources ) ( of ( atmospheric ( , ( organic chlorine ) ) ) ) ) ( are ( reduced ( in ( the future ) ) ) ) ) ) ( , ( ( ( the ( relative contribution ) ) ( of ( CH3Cl ( to ( chlorine ( in ( the stratosphere ) ) ) ) ) ) ) ( ( will increase ) . ) ) ) )
(ROOT (S (SBAR (IN As) (S (NP (NP (JJ anthropogenic) (NNS sources)) (PP (IN of) (NP (JJ atmospheric) (, ,) (JJ organic) (NN chlorine)))) (VP (VBP are) (VP (VBN reduced) (PP (IN in) (NP (DT the) (NN future))))))) (, ,) (NP (NP (DT the) (JJ relative) (NN contribution)) (PP (IN of) (NP (NP (NNS CH3Cl)) (PP (TO to) (NP (NP (NN chlorine)) (PP (IN in) (NP (DT the) (NN stratosphere)))))))) (VP (MD will) (VP (VB increase))) (. .)))
As anthropogenic sources of atmospheric, organic chlorine are reduced in the future, the relative contribution of CH3Cl to chlorine in the stratosphere will increase.
(ROOT (S (NP (DT The) (NN stratosphere)) (VP (VBZ is) (NP (DT the) (NN heat) (NN source))) (. .)))