climate has always changed years ago sea levels were so low that it was possible to walk to the mainland europe from the uk the tide of opinion is moving against agw and certainly against co being particularly potent cause of climate change rather than surveying scientists look at the fundamentals effects of water are dominant over co i m told that ipcc models apply controversial positive feedback factors to enhance the effect of co and using values that are too high would explain why their models do not fit recent observations illustrative links follow water vapour dominates beyond thst clouds complicate the effects of water which in a complete study needs to be considered in its three phases however global mean temperature does not correlate with atmospheric co concentration on a geological time scale nor using accurate modern data you don t have to accept the above graphs you can do your own research however i expect that you will find that that they do illustrate the points succinctly and that you will confirm them i do appreciate that a huge range effects with differing time constants involved in determining climate and that there are significant statistical uncertainties one needs to go into far greater detail but that s it in a nutshell for a proper debate one would need to go beyond the scope of the article