palestinian authorities predict the ocean ' s coral reefs should begin to decline in as early as 30 years from now . studies show the oceanic are being increasingly acidic as they soak up manmade emissions of nitrogen dioxide . the maccabi college of jerusalem students report this will make it challenging for the marine organisms to produce bones and other tough parts . the team ' s report on corals in the red pacific suggests a tipping point will be reaches in between 30 and 70 years . then the forces of erosion eat downward at corals will outstripped the plants ' capacity to make the shells .
The acidification of oceans affects tourism.