The article reports a study designed to make a life cycle inventory (LCI) analysis of major fossil energies (coal, oil, LPG, LNG) imported to Japan, prompted by ever-growing concerns about global warming. The analysis spans mining, liquefaction, overseas transportation, combustion, and equipment construction. LCI analysis results for coal show a considerable environmental load of methane. The marine transport stage also produced a massive environmental load. Coking coals were responsible for a lesser environmental load than steam coal while transported.
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