 been caused by human, in part, by 
human-caused action.

                              {time}  2230

  Basically, I think that one of the major newspapers I was seeing had 
a headline that said ``The Debate is Over: It's Fact.'' And I think 
that pretty much summarizes the state of this situation.
  Arguing about whether or not global warming exists right now is a 
little bit like arguing gravity. It is something you could do several 
hundred years ago, but not today. We have a lot of questions about the 
