The global warming shift is there for all of us to see if we look beyond our little shells. The question that needs answers is how much global pollution has to do with it. The extent of global pollution is sickening, but how much it is contributing to warming is where the argument lies. Throughout geologic time there have been many temperature shifts, some subtle, some severe.Go back only thousands of years, and ice sheets covered much of the northern hemisphere, down to the northern midwest in the United States. Between glacial periods were warm periods, with many fluctuations. All of this was before Man was able to do damage that would affect climate. It looks like we are shifting into a an even warmer part of the present warm period. I worked in geology-paleontology-ecology for a major oil company until my retirement. We will not see it, but our grandchildren may find that New Orleans may be moved upriver a bit.