The humor is the fact that the two headlines were right next to each other. Atlantis....global warming...eeesh.
What the stories really point to...which environmentalists hate to hear...is that the earth is simply not constant. It changes on a continual basis. It doesn't matter what you do...it will continue to change. Its like a cycle...it has to heat up....and then cool down. And this all takes thousands, if not millions, of years.
On the Atlantis discovery...the story has alot to still prove. If they do point this out...the timeline involved will be interesting to see.