Temperature fluctuations historically are normal. I remember when I was a kid in the 70’s the big scare was the coming Ice Age. Unfortunately this seems to be a topic that is driven by politics instead of science. A perfect example is Darwin’s theory of Evolution; any mention of the FACT that it is a THEORY stirs the scientific community into a frenzy. The scientific community is comparable to the fishing community. We continually debate the best technique or equipment to use in a given situation and they argue global warming.