The article states that scientists have wondered what cause the Little Ice Age and provides three suggestions about causes of the Little Ice Age. The professor explains that these suggestions are out of the date and refutes each of the author's reasons. First, the reading claims that disruption of the ocean current may cause the cooling. The professor refutes this point by saying that Gulf Stream would cause cooling only in Europe and North America. He states that Little Ice Age affected the southern hemisphere in places like New Zealand and southern Africa. Second, the article posits that volcanic eruptions have caused the cooling. However, the professor says that a large amount of the volcanic dust in the atmosphere would have the
