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地热是来自地球内部的热。按目前地热井可以钻到4000米深度计算,大陆地壳浅层就贮存有相当于3.57亿亿吨标准煤的热量。
Geothermal is from the heat inside the Earth. According to the current geothermal wells can be drilled to 4000 meters depth calculation, the continental crust shallow store equivalent to 3.57 billion tons of standard coal heat.