( ( ( ( ( ( ( The movement ) ( of ( air ( across ( the Earth ) ) ) ) ) ( ( is also ) ( influenced ( by ( ( the heat ) ( of ( the sun ) ) ) ) ) ) ) - ) and ) ( ( ( this movement ) ( of ( ( ( ( air , ) or ) ( pressure difference ) ) , ) ) ) ( is ( what ( causes ( ( all ( the changes ) ) ( in ( our weather ) ) ) ) ) ) ) ) . )
(ROOT (S (S (NP (NP (DT The) (NN movement)) (PP (IN of) (NP (NP (NN air)) (PP (IN across) (NP (DT the) (NN Earth)))))) (VP (VBZ is) (ADVP (RB also)) (VP (VBN influenced) (PP (IN by) (NP (NP (DT the) (NN heat)) (PP (IN of) (NP (DT the) (NN sun)))))))) (: -) (CC and) (S (NP (NP (DT this) (NN movement)) (PP (IN of) (NP (NP (NN air)) (, ,) (CC or) (NP (NN pressure) (NN difference)) (, ,)))) (VP (VBZ is) (SBAR (WHNP (WP what)) (S (VP (VBZ causes) (NP (NP (PDT all) (DT the) (NNS changes)) (PP (IN in) (NP (PRP$ our) (NN weather))))))))) (. .)))
The movement of air across the Earth is also influenced by the heat of the sun - and this movement of air, or pressure difference, is what causes all the changes in our weather.
(ROOT (S (NP (NP (DT The) (NN movement)) (PP (IN of) (NP (NP (DT an) (NN air) (NN mass)) (PP (IN over) (NP (NP (NN earth) (POS 's)) (NN surface)))))) (VP (VBZ causes) (NP (JJ local) (NN weather) (NNS changes))) (. .)))