( ( As ( long ( as ( oil ( is ( used ( as ( an ( energy source ) ) ) ) ) ) ) ) ) ( , ( spills ( ( ( will not ) ( be eliminated ) ) . ) ) ) )
(ROOT (S (ADVP (RB As) (RB long) (SBAR (IN as) (S (NP (NN oil)) (VP (VBZ is) (VP (VBN used) (PP (IN as) (NP (DT an) (NN energy) (NN source)))))))) (, ,) (NP (NNS spills)) (VP (MD will) (RB not) (VP (VB be) (VP (VBN eliminated)))) (. .)))
As long as oil is used as an energy source, spills will not be eliminated.
(ROOT (S (NP (NNP Oil)) (VP (VBZ is) (NP (NP (DT the) (ADJP (RBS most) (RB commonly) (VBN used)) (NN source)) (PP (IN of) (NP (NP (NN energy)) (PP (IN in) (NP (DT the) (NN world))))))) (. .)))