(1)由图可以看出,近150年来大气中二氧化碳含量的变化趋势是什么?
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(2)大气中二氧化碳升高的原因有哪些?
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(3)我们应采取哪些措施来控制大气中二氧化碳的含量?
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(4)近150年来,全球气温变化趋势如何?与二氧化碳含量有何关系?
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(5)近百年来,全球海平面变化趋势如何?为什么?
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