( ( ( Coral reefs ) ( throughout ( the world ) ) ) ( ( are ( being ( threatened ( both ( ( ( ( by ( ( ( global warming ) , ) ( which ( is ( raising ( ( the temperatures ) ( of ( shallow ( tropical ( ocean waters ) ) ) ) ) ) ) ) ) ) , ) and ) ( by ( ( polluted runoff ) ( from ( development ( on ( adjacent shorelines ) ) ) ) ) ) ) ) ) ) ) . ) )
(ROOT (S (NP (NP (JJ Coral) (NNS reefs)) (PP (IN throughout) (NP (DT the) (NN world)))) (VP (VBP are) (VP (VBG being) (VP (VBN threatened) (PP (CC both) (PP (IN by) (NP (NP (JJ global) (NN warming)) (, ,) (SBAR (WHNP (WDT which)) (S (VP (VBZ is) (VP (VBG raising) (NP (NP (DT the) (NNS temperatures)) (PP (IN of) (NP (JJ shallow) (JJ tropical) (NN ocean) (NNS waters)))))))))) (, ,) (CC and) (PP (IN by) (NP (NP (JJ polluted) (NN runoff)) (PP (IN from) (NP (NP (NN development)) (PP (IN on) (NP (JJ adjacent) (NNS shorelines))))))))))) (. .)))
Coral reefs throughout the world are being threatened both by global warming, which is raising the temperatures of shallow tropical ocean waters, and by polluted runoff from development on adjacent shorelines.
(ROOT (S (NP (NP (NNP Ocean) (NNP ridges)) (VP (VBN formed) (PP (IN by) (NP (NP (JJ marine) (NNS invertebrates)) (VP (VBG living) (PP (IN in) (NP (JJ warm) (JJ shallow) (NNS waters))) (PP (IN within) (NP (NP (DT the) (JJ photic) (NN zone)) (PP (IN of) (NP (DT the) (NN ocean)))))))))) (VP (VBP are) (VP (VBN called) (NP (NN coral) (NNS reefs)))) (. .)))