“It’s not a theory, it’s a fact. However the same can not be said for the cause of the warming. “
When you talk to a scientist, “theory” means something very different than what you think it does. It doesn’t mean “hypothesis”, as you seem to suggest.
On lemmings- yes, I had “herd” that, but calling people lemmings is a tad off base in purpose, IMO: http://www.snopes.com/disney/films/lemmings.asp
Disney herded them off a cliff to make the popular film that gave the impression that they commit “suicide”, or follow others to their deaths purposely. That some die accidentally during mishap in migration is certainly possible, but calling others “lemmings” because they follow blindly to catastrophy is a bit of blind belief in Disney stories (Yes- I’m on a mission to dispel the myth) 
I think the ones in front get to the edge, and a bit of “Festival Seating” hysteria ensues. Wacky rodents- LOL
