( ( As ( altitude increases ) ) ( , ( ( temperature ( in ( the troposphere ) ) ) ( decreases . ) ) ) )
(ROOT (S (PP (IN As) (NP (NN altitude) (NNS increases))) (, ,) (NP (NP (NN temperature)) (PP (IN in) (NP (DT the) (NNP troposphere)))) (VP (VBZ decreases)) (. .)))
As altitude increases, temperature in the troposphere decreases.
(ROOT (S (PP (IN As) (NP (NN altitude) (NNS rises))) (, ,) (NP (DT the) (NN temperature)) (VP (VBZ increases) (PP (IN in) (NP (DT the) (NN thermosphere)))) (. .)))