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?
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619905| 5360
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发表于 2012-2-3 01:53:03
同RC，也是lz边听录音，手打讲解上去的。实在太困了，允许我先弄好两份发上来了，更新中......
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