What Are the Real Lessons Concerning Climate Change?

Few doubt that there have been and continue to be changes in climatic conditions, but it is very important to consider the causes of such climate change. With data that indicates that the current warming is not isolated in history, what causes climate warming? In this talk, we look at promising lines of investigation conducted by a number of researchers and examine carefully some of the climate modelling of the Intergovernmental Panel on Climate Change (IPCC). How much evidence do we have that humanity is impacting the world climate?