( Energy ( ( can ( come ( from ( ( ( ( ( ( the sun ) ( -LRB- ( radiation -RRB- ) ) ) , ) ( ( the atmosphere ) ( -LRB- ( conduction -RRB- ) ) ) ) or ) ( ( the earth ) ( -LRB- ( conduction -RRB- ) ) ) ) ) ) ) . ) )
(ROOT (S (NP (NNP Energy)) (VP (MD can) (VP (VB come) (PP (IN from) (NP (NP (NP (DT the) (NN sun)) (PRN (-LRB- -LRB-) (NP (NN radiation)) (-RRB- -RRB-))) (, ,) (NP (NP (DT the) (NN atmosphere)) (PRN (-LRB- -LRB-) (NP (NN conduction)) (-RRB- -RRB-))) (CC or) (NP (NP (DT the) (NN earth)) (PRN (-LRB- -LRB-) (NP (NN conduction)) (-RRB- -RRB-))))))) (. .)))
Energy can come from the sun (radiation), the atmosphere (conduction) or the earth (conduction).
(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)))))))) (. .)))