Environmental Science 3: Biodiversitys is a study guide app developed based upon over 25 years of teaching environmental science courses. The four apps in this series are ENSC 1: Basic Concepts, ENSC 2: Air, Water and Climate, ENSC 3: Biodiversity and ENSC 4: Economics and Values cover the definitions and concepts covered in an environmental course. In addition to the topic coverage, each subsection of terms and concepts is supported with a quiz to determine the mastery of the subjects. Quizzes can be taken multiple times to improve your score. While the apps in this series can not take the place of an environmental science course, they are good supplements for study.