( ( A ( positive feedback ) ) ( ( amplifies ( changes ( in climate ) ) ) . ) )
(ROOT (S (NP (DT A) (JJ positive) (NN feedback)) (VP (VBZ amplifies) (NP (NP (NNS changes)) (PP (IN in) (NP (NN climate))))) (. .)))
A positive feedback amplifies changes in climate.
(ROOT (S (NP (JJ Positive) (NN feedback)) (VP (VP (VBZ intensifies) (NP (NP (DT a) (NN change)) (PP (IN in) (NP (NP (DT the) (NN body) (POS 's)) (JJ physiological) (NN condition))))) (CONJP (RB rather) (IN than)) (VP (VBG reversing) (NP (PRP it)))) (. .)))