Principles and Measurements in Environmental Biology aims to provide an understanding of some important physical principles and their application in biology. The book also aims to describe how instruments utilizing these principles can be used to measure biological and environmental processes and their interactions. This book covers the effects of the environment on biological organisms; the application of theories of radiation, kinetic theory, gas laws, and diffusion in biology; and water and its properties. The relation of plants with atmosphere near the ground is also discussed. This book also presents sampling techniques; the computation of errors used in the interpretation of data; the use of different devices; and data gathering and its practical applications. This text is for students, researchers, and professionals and experts in biology who wish to understand the mentioned principles in physics, its mathematical aspects, and their applications in the field.