Facts101 is your complete guide to Principles of Environmental Science. In this book, you will learn topics such as Evolution, Species Interactions, and Biological Communities, Human Populations, Biomes and Biodiversity, and Environmental Conservation plus much more. With key features such as key terms, people and places, Facts101 gives you all the information you need to prepare for your next exam. Our practice tests are specific to the textbook and we have designed tools to make the most of your limited study time.