歷史脈絡(「後蒸氣引擎時代」已開發國家的逐步發展，加上低度開發國家能源需求的增長)Historical context (the "post steam engine" evolving growth of the developed countries, superimposed on the growing energy needs of less-developed countries)
更永續的未來能源來源
Energy sources for a more sustainable future
