I found this article on MSNbc that I thought you guys would find interesting. There are so many threats to our coral reefs that if it isn't global warming, contamination or over-harvesting it's the carbon dioxide in our atmosphere that will kill off our reefs. Anyway, here is the link to the article:
http://msnbc.msn.com/id/13693174/?GT1=8307
http://msnbc.msn.com/id/13693174/?GT1=8307