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[音频]Al Gore calls global warming an “
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[音频]If energy use per person and technology remain the same, total energy use and greenhouse gas1(mainly, CO2)will be 42% higher in 2050. But that’s too low, because societies that grow richer use more energy. We need economic growth unless we2the world’s poor to their present poverty and freeze everyone else’s living standards.
[音频]The practical solution is that if global warming is a1 , the only solution is new technology. Only an aggressive research and development program might find ways of breaking our dependence on2 or dealing with it.
只有吸收聚集光能的作用而无光化学活性的色素叫作：
下面哪一个成分不是叶绿体电子传递链的成分?
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