The settled "science," which is to say anti-scienc
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So the left ignores dramatic changes in global climate about which we have abundant evidence, scientific and documentary, based upon people living in these periods. During the Roman Warm Period, the climate was 2℃ to 6℃ hotter than it is today. The Dark Age Cold Period saw a significantly cooler climate than today. The Medieval Warming Period, which lasted centuries, saw the climate 3℃ warmer than it is today, and the Little Ice Age, which ended shortly before the American Civil War, saw temperatures 2℃ lower than today.
None of these climatic changes in temperature can be explained by human activity, and all of them produced changes greater than what the Chicken Little leftists claim will produce the end of civilization.