"Now I certainly can't scientifically link any single event to human-induced climate change," said Dr. Rajendra Pachauri, IPCC Chair, "but the aggregation, the trend and the entire picture that's now before us and observations going back over time clearly show that the intensity and frequency of these extreme events is on the increase." Dr. Pachauri discusses the Fifth IPCC Assessment Report, and how it will affect human civilization and the poorest nations on our planet.