( ( If ( there ( is ( little ( air movement ) ) ) ) ) ( , ( ( ( the ozone ) ( forming ( ( ( compounds buildup ) and ) ( more ozone ) ) ) ) ( ( can ( be formed ) ) . ) ) ) )
(ROOT (S (SBAR (IN If) (S (NP (EX there)) (VP (VBZ is) (NP (JJ little) (NN air) (NN movement))))) (, ,) (NP (NP (DT the) (NN ozone)) (VP (VBG forming) (NP (NP (JJ compounds) (NN buildup)) (CC and) (NP (JJR more) (NN ozone))))) (VP (MD can) (VP (VB be) (VP (VBN formed)))) (. .)))
If there is little air movement, the ozone forming compounds buildup and more ozone can be formed.
(ROOT (S (NP (NN Ozone)) (VP (VBZ is) (NP (NP (DT a) (NN compound)) (VP (VBN formed) (SBAR (WHADVP (WRB when)) (S (NP (EX there)) (VP (VBZ is) (VP (VBG sparking) (NP (JJ electrical) (NN equipment))))))))) (. .)))