( Earth ( ( ( ( radiates energy ) back ) ( into space ) ) . ) )
(ROOT (S (NP (NNP Earth)) (VP (VBZ radiates) (NP (NN energy)) (PRT (RP back)) (PP (IN into) (NP (NN space)))) (. .)))
Earth radiates energy back into space.
(ROOT (S (NP (NP (NNS Gases)) (PP (JJ such) (IN as) (NP (NN co2) (CC and) (NN methane)))) (VP (MD can) (VP (NN trap) (NP (NP (JJ thermal) (NN energy)) (PP (IN in) (NP (NP (NN earth) (POS 's)) (NN atmosphere)))) (PP (IN before) (S (VP (VBG radiating) (NP (PRP it)) (PP (IN into) (NP (NN space)))))))) (. .)))