Energy Use in the U. S. Food System

摘要: An investigation into the growth of energy use in food system is presented. attempt made to compare present supply system, measures, with those other societies and U. S. past. The provided by sun omitted survey, but factors considered are fuel (direct use), electricity, fertilizer, agricultural steel, farm machinery, tractors, irrigation, processing industry paper packaging, glass containers, steel cans aluminum, transport (fuel), trucks trailers, commercial refrigeration cooking, machinery (home Commercial), home cooking. Private delivery individual not included. Energy subsidies for various crops shown countries compared system. In primitive cultures, 5 50 calories were obtained each calorie invested. Industrialized systems require 10 obtain 1 calorie. analysis flow illustrates features unrealized a usual economic analysis. (32 references) (MCW)