The little ice age was a period of unusually cold temperature in many parts of the world that lasted from about the year 1350 until 1900CE. There were unusually harsh winters, and glaciers grew larger in many areas. Scientist have long wondered what cause

According to the lecturer and the reading passage there are several positive point about little ice agree and several negative points about little ice age. The lecturer explains that the reasons of cold temperature are not matching with the reasons that mentioned in reading passage. However, reading passage contends that those reasons are the main cause of cold temperature.

The first point that the lecturer makes is that glaciers occurs only in some area.
According to the professor, glaciers will cause cooling only in Europe and North
America, while little ice age affect southern, New Zealand. He mentioned that those causes cannot be explained. This point from the lecturer contrasts with the reading because the reading only says that the cooling may have been caused by disrupting of ocean currents. Before the Little Ice Age, there was a period of unusually warm weather during which glaciers melted.

Another point that the lecturer uses to cast doubt on the reading that volcanic may lead to dust in the atmosphere. The lecturer claims that large amount of volcanic will produce visual effect that peoples can see it. For example,
there will be colorful sunset, grey or brown snow instead of white. It's seems that volcanic was not large enough to produce dust that lead to lower the temperature. However, the reading only states that When volcanoes erupt, they send dark clouds of dust and sulfur gas into the atmosphere.

Finally, the professor stated that, on the contrary of the reading, about forest stooped warming greenhouse effect by removing carbon dioxide. In other words, there was not enough time to this effect to work. The human population grew quickly which mean forest cut down to clear the surrounding field and feed population, forest that mentioned were not long enough to cause cooling of climate. This contradicts the final idea of the reading passage because it only says that
with more forest trees carbon dioxide, earth became cooler. And human populations may have contributed indirectly to the cooling of the climate.