( ( Warm air ) ( ( ( holds ( more ( water vapor ) ) ) ( so ( we ( have ( ( ( both ( more drought ) ) and ) ( more flood ) ) ) ) ) ) . ) )
(ROOT (S (NP (JJ Warm) (NN air)) (VP (VBZ holds) (NP (JJR more) (NN water) (NN vapor)) (SBAR (IN so) (S (NP (PRP we)) (VP (VBP have) (NP (NP (DT both) (JJR more) (NN drought)) (CC and) (NP (JJR more) (NN flood))))))) (. .)))
Warm air holds more water vapor so we have both more drought and more flood.
(ROOT (S (SBAR (IN Because) (S (NP (NNS trees)) (VP (VBP add) (NP (NN water) (NN vapor)) (PP (TO to) (NP (NN air)))))) (, ,) (S (VP (VBG cutting) (PRT (RP down)) (NP (NNS forests)))) (VP (VBZ leads) (PP (TO to) (NP (NP (JJR longer) (NNS periods)) (PP (IN of) (NP (NN drought)))))) (. .)))