Because of that large amounts of particular types of pesticides and fertilizers and the like have to be used to defend against these outside threats; and those bring their own series of environmental consequences, so we'll go into that in some detail.

由于上述原因,人们大剂量使用某些,杀虫剂和化肥,这样做是为了抵御外来威胁,这带来了一系列的环境影响,我们来详细看看是怎么回事

耶鲁公开课 - 关于食物的心理学、生物学和政治学课程节选