( ( Remember ( that ( ( the earth ) ( ( exists ( in ( ( a state ) ( of ( thermal equilibrium ) ) ) ) ) ( with ( ( space , ) ( where ( ( ( the energy ) ( of ( incoming radiation ) ) ) ( equals ( ( the energy ) ( ( re-radiated back ) ( into space ) ) ) ) ) ) ) ) ) ) ) ) . )
(ROOT (S (VP (VB Remember) (SBAR (IN that) (S (NP (DT the) (NN earth)) (VP (VBZ exists) (PP (IN in) (NP (NP (DT a) (NN state)) (PP (IN of) (NP (JJ thermal) (NN equilibrium))))) (PP (IN with) (NP (NP (NN space)) (, ,) (SBAR (WHADVP (WRB where)) (S (NP (NP (DT the) (NN energy)) (PP (IN of) (NP (JJ incoming) (NN radiation)))) (VP (VBZ equals) (NP (NP (DT the) (NN energy)) (VP (VBN re-radiated) (PRT (RP back)) (PP (IN into) (NP (NN space)))))))))))))) (. .)))
Remember that the earth exists in a state of thermal equilibrium with space, where the energy of incoming radiation equals the energy re-radiated 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)))))))) (. .)))