Re:Frost post! (Score 1)

The oceans are also becoming more acidic. An article in Scientific American (Doney, S. 2006. The Dangers of Ocean Acidification. Scientific American. 294(3):58-65) brings to light a hypothesis where global trends in hydrogen sulphide and carbon dioxide was partly responsible for the mass extinctions at the end of the Permian period. Also, organisms that rely on calcium carbonate and aragonite for their shells will be at risk as calcium carbonate and aragonite dissociate in acidic environments. An interesting read for any who are interested in the subject.