With each increase in man's population, the wilderness areas where the animals live get smaller. The use of pesticides to control injurious insects also harms wild birds and animals.

With each increase in man's population, the wilderness areas where the animals live get smaller. The use of pesticides to control injurious insects also harms wild birds and animals.

随着人口的每一次增长，动物居住的荒野地区变得越来越小，使用杀虫剂来控制有害昆虫也危害到野生鸟类和动物。