Is the "Dead Zone" in the Gulf of Mexico made worse by AGW,or is it a "hoax" or a "natural occurrence"?

Question

There is a "Dead Zone" off the Wash. / Ore. coast also.

http://www.kristy/global/story.asp?s=8718376

Answer 1

I think it has to do with agricultural run off but not sure.  Here is an article that isn't going to help matters

http://news.yahoo.com/s/nm/20080723/us_n...

Answer 2

The dead zone is a natural occurrence.  It is formed when salt and fresh water mix in large quantities.  It is rather large this year due to the midwest flooding in the spring.