( ( Burning ( fossil fuels ) ) ( ( ( ( releases ( sulfur compounds ) ) ( -LRB- ( aerosols -RRB- ) ) ) ( into ( the atmosphere ) ) ) . ) )
(ROOT (S (NP (NN Burning) (NN fossil) (NNS fuels)) (VP (VBZ releases) (NP (NN sulfur) (NNS compounds)) (PRN (-LRB- -LRB-) (NP (NNS aerosols)) (-RRB- -RRB-)) (PP (IN into) (NP (DT the) (NN atmosphere)))) (. .)))
Burning fossil fuels releases sulfur compounds (aerosols) into the atmosphere.
(ROOT (S (NP (DT The) (NN element) (NN sulfur)) (VP (VBZ is) (VP (VBN released) (PP (IN into) (NP (DT the) (NN atmosphere))) (PP (IN by) (NP (NP (DT the) (NN burning)) (PP (IN of) (NP (JJ fossil) (NNS fuels))))))) (. .)))