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卅～四十年代时,煤炭5～6日元/吨,重油约30日元/吨。按当对的折算率,煤炭约为1.25美元/吨,重油约为1.28美元/桶。煤炭的价格约为石油的1/6。五十年代后石油化学出现,石油价格1～1.5美元/桶,煤炭价格上升到5～10美元/吨。1960年,新兴产油国成立OPEC(发展中国家产油国)组织。1972年2月,原油协议价格7～11美元/桶。1973年1月以后,由于能源消费增长,以及造成环境污染问题,加上世界石油资源有限,石油价格逐步上涨。1973年达到13.33美元/桶,1979年4月达到14.54美元/桶,同年6月达20美元/桶、12月达
From the 1940s to the 1940s, coal was 5-6 yen/ton, and heavy oil was about 30 yen/ton. According to the correct conversion rate, coal is about 1.25 US dollars / ton, heavy oil is about 1.28 US dollars / barrel. The price of coal is about 1/6 of oil. After the fifties, petrochemicals appeared. Oil prices ranged from US$1 to US$1.5/barrel and coal prices rose to US$5 to US$10 per ton. In 1960, emerging oil-producing countries established OPEC (Oil Production Countries in Developing Countries) organization. In February 1972, the crude oil contract price was 7-11 dollars per barrel. Since January 1973, due to the increase in energy consumption, environmental pollution, and the world’s limited oil resources, oil prices have gradually increased. It reached US$13.33 per barrel in 1973, reached US$14.54 per barrel in April 1979, reached US$20 per barrel in June of the same year, and reached in December