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  3. Pessimistic forecasts say that there is only enough coal for 450 years, enough natural gas for 50 years and that oil might run o

Pessimistic forecasts say that there is only enough coal for 450 years, enough natural gas for 50 years and that oil might run o

admin2008-12-30  86
问题 Pessimistic forecasts say that there is only enough coal for 450 years, enough natural gas for 50 years and that oil might run out in 30 years.
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答案不乐观的说法是，煤的储量只供450年之用，天然气只满足50年之需，而石油只能用30年。
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