On Monday the United Nation's Intergovernmental Panel on Climate Change released a dire report warning the world that the extreme and unprecedented weather events across the globe would continue to occur and accelerate if humanity does not combat climate change. CBS News' meteorologist and climate specialist Jeff Berardelli discuss the report in detail with CBS News foreign correspondent Roxana Saberi. He explains how human's have "warmed the atmosphere, ocean and land;" and what can be done to reverse global warming.