The world's getting hotter, the sea's rising and there's increasing evidence neither are naturally occurring phenomena. So says a report from the U.N. International Panel on Climate Change, a document released every six years that is considered the benchmark on the topic. More than 800 authors and 50 editors from dozens of countries took part in its creation. The U.N. is 95 percent sure that we are causing global warming. Part of me doesn't want to believe them, but how can you argue with people who know a heck of a lot more about this than us?