israeli scientists predict the world ' s underwater reefs do begin to collapse in as long as 30 years from now . studies show the oceans are becoming increasingly acidic as they marinade up manmade emissions of carbon dioxide . the hebrew university of jerusalem researchers say this will turn it difficult for many tropical organisms to produce structure and other tight forms . the team ' s work on invertebrates in the black river suggests a tipping moment will be found in between 30 and 70 ages . then the forces of reclamation stripping away at calcareous will outpaces the organisms ' ability to make the structures .
The acidification of oceans affects tourism.