( ( Like ( fossil fuel ) ) ( , ( ( algae fuel ) ( ( releases ( CO2 ( when ( ( ( ( burnt ( , ( but ( unlike ( ( ( ( ( fossil fuel ) , ) ( algae fuel ) ) and ) ( other biofuels ) ) ) ) ) ) ( only ( release CO2 ) ) ) ( recently ( ( removed ( from ( ( the atmosphere ) ( via photosynthesis ) ) ) ) ( as ( the ( ( algae or ) plant ) ) ) ) ) ) grew ) ) ) ) . ) ) ) )
(ROOT (S (PP (IN Like) (NP (JJ fossil) (NN fuel))) (, ,) (NP (JJ algae) (NN fuel)) (VP (VBZ releases) (NP (NP (NNP CO2)) (SBAR (WHADVP (WRB when)) (S (NP (NP (UCP (ADJP (JJ burnt)) (, ,) (CC but) (PP (IN unlike) (NP (NP (JJ fossil) (NN fuel)) (, ,) (NP (JJ algae) (NN fuel)) (CC and) (NP (JJ other) (NNS biofuels))))) (JJ only) (NN release) (NN CO2)) (VP (ADVP (RB recently)) (VBN removed) (PP (IN from) (NP (NP (DT the) (NN atmosphere)) (PP (IN via) (NP (NN photosynthesis))))) (PP (IN as) (NP (DT the) (NN algae) (CC or) (NN plant))))) (VP (VBD grew)))))) (. .)))
Like fossil fuel, algae fuel releases CO2 when burnt, but unlike fossil fuel, algae fuel and other biofuels only release CO2 recently removed from the atmosphere via photosynthesis as the algae or plant grew.
(ROOT (S (NP (JJ Co2) (NN gas)) (VP (VBZ is) (VP (VBN released) (PP (IN into) (NP (NP (DT the) (NN atmosphere)) (SBAR (WHADVP (WRB when)) (S (NP (JJ fossil) (NNS fuels)) (VP (VBP are) (VP (VBN burned))))))))) (. .)))