美国农业部经济学家A·E·盖洛(A·E·Gallo)和J·M·康纳(J·M·Connor)对食品包装的费用进行了调查。从调查的结果来看,近年来,包装费用在整个食品价格中占有很大的比重。过去的食品包装是为了防止食品的腐烂、保持食品的新鲜,但是,最近使用包装的目的是为了使用大型机械来进行运输,和防止食品的损坏。因此,使用大量的包装材料就需要很高的费用。如果 Costs for food packaging were investigated by U.S. Department of Agriculture economists AE Gallo and JM Connor. From the survey results, in recent years, packaging costs account for a large proportion of the entire food price. In the past, food packaging was designed to prevent the decay of food and keep the food fresh. However, the recent use of packaging aims at using large machinery for transportation and preventing food from being damaged. Therefore, the use of large amounts of packaging materials will require a high cost. in case