自一九七三年以来,“能源危机”已成为人类生存的四大威胁之一。许多学者担心,到下个世纪,人类将会在能源饥荒中艰难行进。是的,占世界能源消费比重92%的石油、煤和天然气枯竭的那一天已为期不远!按照目前的开采速度,石油和天然气的世界总储量仅能开采三十年和四十七年,即使蕴藏量最丰富的非再生能煤的经济可采储 Since 1973, the “energy crisis” has become one of the four major threats to human survival. Many scholars are concerned that humanity will be struggling in the energy famine by the next century. Yes, the day when the oil, coal, and natural gas, which account for 92% of the world’s energy consumption, is depleted, it is not far off! According to the current rate of exploitation, the world’s total reserves of oil and natural gas can only be exploited for thirty years and forty-seven years. Even the most economically recoverable non-renewable coals with the most abundant reserves