It does start rather slow but I recommend watching the whole documentary. There are 2 significant points that may be of interest for those who want to get to the meat of it. 1.) At 20 min.:35sec. It is shown that CO2 data was miss read by Al Gore. CO2 increases lag behind warming periods by 800 years on average. So, CO2 is not a cause but an effect of increased global temperatures. 2.) at 28min.:42sec. There is an alternative theory, which seems sound, that sun activity is causing global warming. Hope that helps there is more info than this but they are what I feel are significant.