In the developing countries, it says, most of the environmental problems are caused by underdevelopment.
出自-2016年6月阅读原文
柯林斯高阶英汉双解学习词典释义
ADJ
（国家或地区）不发达的，欠发达的，经济落后的
An underdeveloped country or region does not have modern industries and usually has a low standard of living. Some people dislike this term and prefer to use developing.