( ( The article ) ( ( tends ( to ( ( lean ( toward ( the idea ) ) ) ( that ( ( the ( enhanced ( greenhouse effect ) ) ) ( ( ( ( is not ) ( a ( ( naturally occurring ) phenomenon ) ) ) , ) ( rather ( it ( is ( rooted ( in ( human actions ) ) ) ) ) ) ) ) ) ) ) ) . ) )
(ROOT (S (NP (DT The) (NN article)) (VP (VBZ tends) (S (VP (TO to) (VP (VB lean) (PP (IN toward) (NP (DT the) (NN idea))) (SBAR (IN that) (S (NP (DT the) (JJ enhanced) (NN greenhouse) (NN effect)) (VP (VBZ is) (RB not) (NP (DT a) (ADJP (RB naturally) (VBG occurring)) (NN phenomenon)) (, ,) (SBAR (RB rather) (S (NP (PRP it)) (VP (VBZ is) (VP (VBN rooted) (PP (IN in) (NP (JJ human) (NNS actions)))))))))))))) (. .)))
The article tends to lean toward the idea that the enhanced greenhouse effect is not a naturally occurring phenomenon, rather it is rooted in human actions.
(ROOT (S (NP (NNP Human) (NNS actions)) (VP (VBZ has) (VP (VBN increased) (NP (DT the) (NN greenhouse) (NN effect)))) (. .)))