( ( e -RRB- ) ( ( melt ( ( the ( polar caps ) ) ( to ( ( increase ( ( the amount ) ( of carbon-dioxide ) ) ) ( in ( the atmosphere ) ) ) ) ) ) . ) )
(ROOT (S (LST (LS e) (-RRB- -RRB-)) (VP (VB melt) (S (NP (DT the) (JJ polar) (NNS caps)) (VP (TO to) (VP (VB increase) (NP (NP (DT the) (NN amount)) (PP (IN of) (NP (NN carbon-dioxide)))) (PP (IN in) (NP (DT the) (NN atmosphere))))))) (. .)))
e) melt the polar caps to increase the amount of carbon-dioxide in the atmosphere.
(ROOT (S (NP (JJS Most) (NNS scientists)) (VP (VBP agree) (SBAR (IN that) (S (NP (NP (DT an) (NN increase)) (PP (IN in) (NP (NP (DT the) (NN amount)) (PP (IN of) (NP (NP (NN greenhouse) (NNS gases)) (VP (VBG entering) (NP (NP (NN earth) (POS 's)) (NN atmosphere)))))))) (VP (VBZ causes) (NP (NP (DT an) (NN increase)) (PP (IN in) (NP (NP (NN melting)) (PP (IN of) (NP (JJ polar) (NN ice) (NNS caps)))))))))) (. .)))
Most scientists agree that an increase in the amount of greenhouse gases entering earth's atmosphere causes an increase in melting of polar ice caps.