( But ( ( ( increased melting ) ( of ( the ( polar ( ice caps ) ) ) ) ) ( ( would ( ( ( raise ( sea levels ) ) , ) ( ( ( increasing ( ocean ( floor pressures ) ) ) and ) ( prompting ( formation ( of ( more ( gas hydrates ) ) ) ) ) ) ) ) . ) ) )
(ROOT (S (CC But) (NP (NP (VBN increased) (NN melting)) (PP (IN of) (NP (DT the) (JJ polar) (NN ice) (NNS caps)))) (VP (MD would) (VP (VB raise) (NP (NN sea) (NNS levels)) (, ,) (S (VP (VP (VBG increasing) (NP (NN ocean) (NN floor) (NNS pressures))) (CC and) (VP (VBG prompting) (NP (NP (NN formation)) (PP (IN of) (NP (JJR more) (NN gas) (NNS hydrates))))))))) (. .)))
But increased melting of the polar ice caps would raise sea levels, increasing ocean floor pressures and prompting formation of more gas hydrates.
(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.