( There ( ( 's ( ( THERMAL POLLUTION ) ( of water ) ) ) . ) )
(ROOT (S (NP (EX There)) (VP (VBZ 's) (NP (NP (NNP THERMAL) (NNP POLLUTION)) (PP (IN of) (NP (NN water))))) (. .)))
There's THERMAL POLLUTION of water.
(ROOT (S (SBAR (WHADVP (WRB When)) (S (NP (NP (DT the) (NN temperature)) (PP (IN of) (NP (NN water)))) (VP (VBZ is) (VP (VBN increased) (PP (IN after) (S (VP (VBG being) (VP (VBN used) (PP (IN in) (S (VP (VBG cooling)))))))))))) (, ,) (NP (PRP it)) (VP (VBZ is) (NP (JJ thermal) (NN pollution))) (. .)))
When the temperature of water is increased after being used in cooling, it is thermal pollution.