( This ( ( leads ( to ( ( concern ( amongst many ) ) ( that ( ( the ( greenhouse effect ) ) ( is ( being ( ( increased ( by ( human activities ) ) ) ( with ( ( the consequence ) ( of ( global warming ) ) ) ) ) ) ) ) ) ) ) ) . ) )
(ROOT (S (NP (DT This)) (VP (VBZ leads) (S (VP (TO to) (VP (VB concern) (PP (IN amongst) (NP (JJ many))) (SBAR (IN that) (S (NP (DT the) (NN greenhouse) (NN effect)) (VP (VBZ is) (VP (VBG being) (VP (VBN increased) (PP (IN by) (NP (JJ human) (NNS activities))) (PP (IN with) (NP (NP (DT the) (NN consequence)) (PP (IN of) (NP (JJ global) (NN warming)))))))))))))) (. .)))
This leads to concern amongst many that the greenhouse effect is being increased by human activities with the consequence of global warming.
(ROOT (S (NP (NNP Human) (NNS actions)) (VP (VBZ has) (VP (VBN increased) (NP (DT the) (NN greenhouse) (NN effect)))) (. .)))