perp-t2-Q9

[寧寧]

Scientists are discussing ways to remove excess carbon dioxide from the atmosphere by increasing the amount that is absorbed by plant life. One plan to accomplish this is to establish giant floating seaweed farms in the oceans. When the seaweed plants die, they will be disposed of by being burned for fuel

Which of the following, if true, would indicate the most serious weakness in the plan above?

(A) Some areas of ocean in the Southern Hemisphere do not contain sufficient nutrients to support large seaweed farms.
(B) When a seaweed plant is burned, it releases an amount of carbon dioxide comparable to the amount it has absorbed in its lifetime.
(C) Even if seaweed farms prove effective, some people will be reluctant to switch to this new fuel.
(D) Each year about seven billion tons of carbon dioxide are released into the atmosphere but only about five billion tons are absorbed by plant life.
(E) Seaweed farms would make more money by farming seaweed to sell as nutritional supplements than by farming seaweed to sell as fuel.

答案是b~不太懂b在說什麼意思~
可以請教各位嗎

[Huang Hsin-Yi]

T0寧寧
此題應放在CR區喲!

計劃:種seaweed來吸收CO2,而且seaweed死後還可以當肥料
那個選項不支持這個plan

(B)當seaweed燃燒,它所釋放的CO2比之前吸收的CO2還要多.------那不就說明這計劃無效