The consumption inefficiency (CI) index of Bangkok of major product groups (food, plastic, paper, textile, and glass) was annually determined from 1994 to 2018. The CI index ranges from 0 to 1; the higher the index, the lower the consumption efficiency. The results showed that Bangkok had low consumption efficiency with mean CI indices of 0.8 for plastic, 0.7 for glass, and 0.5 for paper product groups. Bangkok had lower mean CI indices of 0.2 for textile and 0.4 for food products. These findings revealed that the high consumption of Bangkokians of plastic, glass, and paper products and inefficient waste sorting (for reuse and/or recycling) before disposal were the co-factors affecting the consumption efficiency of Bangkok. To increase the city’s consumption efficiency, minimization of product consumption and waste for disposal should be considered simultaneously with the improvement of relevant practices and regulations on waste minimization.

从1994年至2018年，每年确定曼谷主要产品组（食品，塑料，纸张，纺织品和玻璃）的消费低效率（CI）指数。CI指数的范围为0至1；指数越高，消耗效率越低。结果表明，曼谷的消费效率较低，塑料的平均CI指数为0.8，玻璃的平均CI指数为0.7，纸类产品的平均CI指数为0.5。曼谷的平均CI指数较低，纺织品为0.2，食品为0.4。这些发现表明，曼谷人对塑料，玻璃和纸制品的高消费以及废物在处置前的低效分类（用于再利用和/或回收）是影响曼谷消费效率的共同因素。为了提高城市的消费效率，