Increased amounts of carbon dioxide (CO2) in the atmosphere are making ocean water more acidic as the gas dissolves to create carbonic acid. Scientists have calculated that ocean chemistry is changing 100 times faster than in the 650,000 years that preceded the modern industrial era and since the late 1980s an overall drop in the pH of the oceans fell from 8.16 to 8.05.
CO2 emissions are causing ocean acidification that threatens survival of wide variety marine organisms.
This rapidly increasing acidity has potential to hamper the ability of many different marine creatures (such as corals) to form calcium carbonate shells and skeletal structures. Scientists are warning that ocean acidification is exceptionally harmful in the larval and juvenile stages in the lives of many marine invertebrates, because ocean acidification not only inhibits calcification, but also affects reproduction and growth in some marine organisms.
As you can see scientists are as usually warning the world, but politics as usually fails to listen their warnings. Reducing carbon emissions is not only important because of ocean acidification but for the whole climate change issue, and all problems related to global warming and climate change. World still awaits obligatory international agreement that would really make the difference, and ensure that all world countries reduce carbon emission levels.