( ( Although ( ( renewables ( such ( as ( ( ( ( ( ( hydropower , ) wind ) , ) biomass ) and ) ( solar thermal ) ) ) ) ) ( ( contribute ( at ( the margin ) ) ) ( to ( ( the ( world 's ) ) ( energy supply ) ) ) ) ) ) ( , ( currently ( , ( they ( ( are ( ( no substitute ) ( for ( ( fossil fuels ) ( for ( meeting ( baseload ( energy needs ) ) ) ) ) ) ) ) . ) ) ) ) ) )
(ROOT (S (SBAR (IN Although) (S (NP (NP (NNS renewables)) (PP (JJ such) (IN as) (NP (NP (NN hydropower)) (, ,) (NP (NN wind)) (, ,) (NP (NNS biomass)) (CC and) (NP (JJ solar) (NNS thermal))))) (VP (VBP contribute) (PP (IN at) (NP (DT the) (NN margin))) (PP (TO to) (NP (NP (DT the) (NN world) (POS 's)) (NN energy) (NN supply)))))) (, ,) (ADVP (RB currently)) (, ,) (NP (PRP they)) (VP (VBP are) (NP (NP (DT no) (NN substitute)) (PP (IN for) (NP (NP (JJ fossil) (NNS fuels)) (PP (IN for) (S (VP (VBG meeting) (NP (JJ baseload) (NN energy) (NNS needs))))))))) (. .)))
Although renewables such as hydropower, wind, biomass and solar thermal contribute at the margin to the world's energy supply, currently, they are no substitute for fossil fuels for meeting baseload energy needs.
(ROOT (S (NP (NNP Hydropower)) (VP (VBZ is) (NP (NP (DT the) (ADJP (RBS most) (RB widely) (VBN used)) (NN form)) (PP (IN of) (NP (NP (JJ renewable) (NN energy)) (PP (IN in) (NP (DT the) (NN world))))))) (. .)))