( ( ( ( The ( Earth 's ) ) surface ) ( in turn ) ) ( ( ( ( heats up ) ( the atmosphere ) ) ( by ( ( ( radiating ( energy ( in ( ( the form ) ( of ( ( infrared ( ( -LRB- ( IR -RRB- ) ) radiation ) ) back ) ) ) ) ) ) out ) ( toward space ) ) ) ) . ) )
(ROOT (S (NP (NP (NP (DT The) (NN Earth) (POS 's)) (NN surface)) (PP (IN in) (NP (NN turn)))) (VP (VBZ heats) (PRT (RP up)) (NP (DT the) (NN atmosphere)) (PP (IN by) (S (VP (VBG radiating) (NP (NP (NN energy)) (PP (IN in) (NP (NP (DT the) (NN form)) (PP (IN of) (NP (NP (JJ infrared) (PRN (-LRB- -LRB-) (NP (NNP IR)) (-RRB- -RRB-)) (NN radiation)) (ADVP (RB back))))))) (PRT (RP out)) (PP (IN toward) (NP (NN space))))))) (. .)))
The Earth's surface in turn heats up the atmosphere by radiating energy in the form of infrared (IR) radiation back out toward 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)))))))) (. .)))