▶ Your Answer : In
the lecture, the speaker asserts that the methods suggested in the reading are not
viable. This contradicts the reading passage’s point that there are plausible
ways to accomplish carbon sequestration.
To
begin with, the lecturer maintains that increasing the amount of phytoplankton
by adding iron to the oceans will not be permanent. To be specific, when organisms
multiply, they lack of nitrogen which will lead to the decline of the
population. Even when large quantity of iron is added, only small amount of CO2
can be stored. This is in direct opposition to the reading’s claim that adding
iron-rich dust to the ocean will encourage more of the organisms to grow,
increasing the amount of CO2 stored in the oceans.
Furthermore,
the speaker contends that it is ineffective to create artificial wetlands to sequester
CO2. This is because, artificial wetlands can store 23% less than natural wetlands
and it takes too long to be fully developed. This rebuffs the reading passage’s
assertion that creating artificial wetlands can reduce the amount of CO2 that
enters the atmosphere.
Lastly,
the lecturer claims that it is problematic to store CO2 in coal mines. To
explain, when CO2 is combined with coal, methane is released which also emits
CO2 when it is burned. Also, some of them can leak out of the atmosphere. This
is in contradictory to the reading’s insistence that CO2 can remain in the coal
mine for hundreds of years. |