▶ Your Answer : It is controversial over whether carbon dioxide in the atmosphere can be reduced by storing CO2 using carbon sequestration. The reading passage is providing three pieces of evidence to prove its points, whereas the lecturer argues against it by providing three compelling rebuttals.
To begin with, the professor in the lecture points out that an approach about phytoplankton could not work. This is because increasing microscopic marine organisms leads to overusing N2 which means decreasing phytoplankton population again. Therefore, this method could store a little percent of CO2. This differs from the author’s claim that uplifting the amount of phytoplankton can absorb CO2 concentration and sink in the Ocean by adding iron. On top of that, the lecturer also maintains that creating artificial wetlands is ineffective method. There is a study that lower than 20 percent of CO2 can be stored in artificial wetlands than natural ones. In addition, according to the research, it will spend a long time on becoming fully developed. This is in opposition to the reading passage that creating wetlands can be effective thanks to preventing Oxygen from entering soil.
Finally, the final assertion made by the professor is that storing CO2 in abandoned coal mines would be problematic. This is since when this method is used Methane is released in the air. However, the Methane can contain carbon. Thus, total amount of CO2 cannot reduce at all. This refutes the reading passage which states that the abandoned coal mines can store CO2 by using fossil-fuel power plants, considering it has special filters.
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