There is a lot of focus on CO₂ and it’s affect on our climate.  While those concerns are legitimate, I believe a more legitimate concern is the acidification of the ocean that results when CO₂ dissolves in it.  We are in effect turning our oceans into big glasses of soda-pop.  Carbolic acid inhibits the ability of shell fish to produce shells and that could severely disrupt the oceans Eco-system.

We should be concerned about this as three quarters of the worlds food supply comes from the ocean.  Oyster beds are failing along the Washington coast.  It is difficult to separate the effects of CO₂ from human activities from other effects such as natural upwelling events and the inflow of fresh water. It is clear that in time the effects of anthropogenic CO₂ emissions will overwhelm other variables. It is not just a matter of coral reefs that are threatened, it is our own food supply.