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当今世界,科学技术高度发达,文明进程不断加快,但人类所赖以生存的地球却面临着一系列的难题,如能源短缺;占世界一半以上的贫困国家和地区人口爆炸,导致饥饿危机加深;全球各地气候
In today’s world, science and technology are highly developed and the process of civilization is accelerating. However, the earth on which mankind depends for survival faces a series of problems such as energy shortage; population explosion in more than half of the world’s poor countries and regions has led to deepening the crisis of hunger; Global climate