Book excerpt: STEM fields are increasingly important today and into the future. People who focus their education on STEM can choose from a wide range of exciting, in-demand careers. This book will introduce students to the importance of the problems our environment faces and the scientists, engineers, and other workers who have made careers trying to correct those problems. Each environmental STEM career is highlighted with the education needed to obtain these jobs and what each of these people do. Maybe one day you will make a difference for our environment by choosing one of these STEM careers! This book will allow students to use evidence to support the explanation that traits can be influenced by the environment.