The way I see it, the climate is constantly changing. I am sure man has some impact on this, but I think it is minimal. Areas that were the breadbasket of Europe in North Africa are now deserts. I have seen the films of the dust bowl in the 1930s. Poor soil conservation made a natural drought even worse, so I believe in preserving what we can. Sea levels have been higher and lower than they are now. I don't know how much CO2 concentrations have to do with it, though. Good thing I didn't build nearer the marsh like some wanted me to.