Want BAD? This would be BAD!

Ocean acifidification could trigger economic devastation

"The authors of the report, released today from the Third Symposium on the Ocean in a High-CO2 World, review the current science on the effects on marine organisms, and write that there is a “medium confidence” level that shellfish harvests will decline. There is also a medium confidence level that economic damage will result from impacts on coral reefs, with tourism, food and shoreline protection suffering. The size of this is unclear but one estimate is for $1 trillion in damage from coral loss alone."

and

"The report authors also say that the acidity of the oceans could increase by 170% by the end of the century, corresponding to a drop in surface ocean pH by 0.32. This occurs under a pessimistic scenario of high human emissions. Since the industrial revolution, surface ocean pH has dropped from 8.2 to 8.1. As pH is a logarithmic scale, the increase in acidity since the industrial revolution could reach around 170% under this scenario.

Under lower-emissions scenarios, this decrease would be around 0.07. But current emissions show no sign of dropping to those necessary to achieve such a goal, cautions Riebesell."

 Yeah, like the title says, BAD.  Simply bad. Indubitably bad. Totally bad.