精选优质文档-倾情为你奉上第二单元What is this book about？这本书是关于什么的？The objective of this book is to introduce engineering and science students to the interdisciplinary study of environment problems；their cause，why they are of concern，and how we can control them. The book includes:这本书的目的是使理工科的学生了解跨学科间的研究环境问题;它们的起因，为什么它们受到关注，以及我们怎样控制它们。这本书包括：Description of what is meant by environment and environmental systems描述环境和环境系统意味着什么Information on the basic causes of environmental disturbances关于引起环境干扰基础
