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能源问题从未像现在这样紧迫。据科学测算,地球上的石油仅够人类44年的需求,天然气还能持续开采63年;铀矿,作为核燃料也只够用60年左右。化石能源日益枯竭,可再生能源中
The energy problem has never been more urgent than it is now. According to scientific calculations, the oil on Earth is only enough for 44 years of mankind’s needs and the natural gas can last for 63 years. Uranium can only be used as nuclear fuel for about 60 years. Fossil fuels are depleting, renewable energy sources