Environmental Plant Physiology focuses on the physiology of plant-environment interactions, revealing plants as the key terrestrial intersection of the biosphere, atmosphere, hydrosphere, and geosphere. It provides a contemporary understanding of the topic by addressing some of humankind’s fundamental biological, agricultural, and environmental challenges. The book identifies thirteen key environmental variables, grouping them into resources, stressors, and pollutants, and explores how these challenge plants at molecular, physiological, whole plant, and ecological levels. Emphasizing the importance of considering spatial and temporal dimensions of environmental change to understand plant function, this text uses a mixture of ecological, environmental, and agricultural examples to offer a holistic view suitable for contemporary students. Each chapter employs a novel stress response hierarchy to integrate plant responses across spatial and temporal scales in an easily digestible framework.