( ( ( ( ( The ( warm Earth ) ) ( ( ( ( ( ( radiates energy ) back ) ( toward space ) ) , ) but ) clouds ) ) and ) ( ( atmospheric gases ) ( can ( ( prevent ( some ( of ( these energies ) ) ) ) ( from escaping ) ) ) ) ) . )
(ROOT (S (S (NP (DT The) (JJ warm) (NN Earth)) (VP (VP (VBZ radiates) (NP (NN energy)) (PRT (RP back)) (PP (IN toward) (NP (NN space)))) (, ,) (CC but) (VP (VBZ clouds)))) (CC and) (S (NP (JJ atmospheric) (NNS gases)) (VP (MD can) (VP (VB prevent) (NP (NP (DT some)) (PP (IN of) (NP (DT these) (NNS energies)))) (PP (IN from) (S (VP (VBG escaping))))))) (. .)))
The warm Earth radiates energy back toward space, but clouds  and atmospheric gases can prevent some of these energies from escaping.
(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)))))))) (. .)))