( ( ( ( Nonrenewable sources ) ( such ( as ( ( ( ( ( ( ( ( ( ( ( ( ( electricity , ) ( fuel oil ) ) , ) ( natural gas ) ) , ) ( liquified ( petroleum gas ) ) ) , ) coal ) , ) ( purchased steam ) ) , ) and ) ( renewable sources ) ) ) ) ) ( such ( as ( ( ( ( ( ( ( ( agriculture ( and ( urban waste ) ) ) , ) ( geothermal energy ) ) , ) ( solar energy ) ) , ) and ) ( wind energy ) ) ) ) ) . )
(ROOT (NP (NP (JJ Nonrenewable) (NNS sources)) (PP (JJ such) (IN as) (NP (NP (NN electricity)) (, ,) (NP (NN fuel) (NN oil)) (, ,) (NP (JJ natural) (NN gas)) (, ,) (NP (JJ liquified) (NN petroleum) (NN gas)) (, ,) (NP (NN coal)) (, ,) (NP (JJ purchased) (NN steam)) (, ,) (CC and) (NP (JJ renewable) (NNS sources)))) (PP (JJ such) (IN as) (NP (NP (NN agriculture) (CC and) (JJ urban) (NN waste)) (, ,) (NP (JJ geothermal) (NN energy)) (, ,) (NP (JJ solar) (NN energy)) (, ,) (CC and) (NP (NN wind) (NN energy)))) (. .)))
Nonrenewable sources such as electricity, fuel oil, natural gas, liquified petroleum gas, coal, purchased steam, and renewable sources such as agriculture and urban waste, geothermal energy, solar energy, and wind energy.
(ROOT (S (S (NP (NNP Coal)) (VP (VBZ is) (ADJP (JJ nonrenewable)))) (, ,) (CC and) (S (NP (DT the) (NN sun)) (VP (VBZ is) (ADJP (JJ renewable) (SBAR (S (VP (VBZ is) (SBAR (WHADVP (WRB how)) (S (NP (NP (NN coal)) (CC and) (NP (DT the) (NN sun))) (VP (VBP compare) (PP (IN as) (NP (NP (NNS sources)) (PP (IN of) (NP (NN energy)))))))))))))) (. .)))