ã¨ãã主æ¨ã®ã³ã©ã ããã«ãªãã©ã«ãã¢å¤§å¦ã¢ã¼ãã¤ã³æ ¡ãã¼ã«ã»ã¡ã©ã¼ã¸çµå¶å¤§å¦é¢åèªææã§ãããªãã£ã¼ãã»Bã»ããã±ã³ã¸ã¼ï¼Richard B. McKenzieï¼ãeconlibã«æ¸ãããããTim Taylorãåãä¸ããã 以ä¸ã¯ãã®ã³ã©ã ã®ä¸ç¯ã The food-supply chain in the United States burns a total of 10.3 quads of fossil-fuel-based energy. (A "quad" is a very large measure of energy: 1Ã1015 BTU; a BTU is the amount of energy needed to raise the temperature of one pound of water by one degree Fahrenheit.) The b
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