The inevitable
Since the beggining of the 'industrial revolution' pH has been increasing at an alarming rate. The .1 increase on the pH scale may seem small, but because the scale increases logarithmicly this actually equates to roughy a 30% increase. We now know that this decrease in pH directly corresponds to the amount of CO2 emissions we give off. The graph below illustrates this relation.
As you may have noticed, current predictions for future CO2 emissions show no signs of slowing down. In accordance, neither do the plummetting pH rates. Regardless of how accurately this reflects our future CO2 emissions or not we definitely won't stop fully anytime soon. We still have a long ways to go before we put an end to our CO2 emissions. That very sad truth behind this is that things are probably going to get a whole lot worse before they get better. As these emissions continue we can reasonably expect a few things:
1. Seafood will become more expensive.
2. Unemployment rates will increase.
3. Species of marine animals will go extinct at faster rates.
If the conditions worsen even further, reaching levels predicted in the graphs, even more drastic things could be predicted such as human conflict or even collapse of food webs. The only true inevitability that can be said almost certainly is that things are going to get slightly worse before they improve. The rate at which we cut back Carbon Emissions is key to the outcome. The figure below shows two possible scenarios the latter of which would kill off mass amounts of ocean life. The disparity here is huge; this is why swift action now is key to fixing this problem.
http://www.iupui.edu/~g115/assets/mod07/05_19.jpg
http://www.climate.gov/sites/default/files/styles/featured-image/public/Ocean_acid_mitig__720_0.png?itok=G-uEP1FF