Hi All, I have done some reading on Climate Change but do not claim any kind of expertise. In fact with all the arguments and counter claims, and counter counter claims.. its difficult to really have any kind of decent view. The problem for me is that I dont really understand what are the major contributors to global warming. I am not going to argue that at any point we should not be taking steps to use less fossil fuels, do less damage to the environment, decrease polution, make better use of resource and waste management through recycling but the feeling that I get is that these will have largely a very small impact on global warming (but still has profound impact on the quality of life and condition of the planet) which seems to be more of a macro problem that we are trying to deal with through micro responses. As I said, I do believe that we need to take many of the steps that we have or are going to continue to take but I dont entirely buy into the lets not drive our cars because we will prevent the world from overheating and the glaciers from melting. So, my questions are (assuming there are definitive answers): What greenhouse gases cause the worlds average temperatures to rise? Do we know? What actual contribution does man make to these figures? In what percentages and from what actions?