Environmental science is interdisciplinary. It embraces a wide variety of topics from different areas of study. Yet, there are several major unifying constructs, or themes, that cut across the many topics included in the study of environmental science.
Energy conversions underlie all ecological processes.
The Earth itself is one interconnected system. Humans alter natural systems. Humans have had an impact on the environment for millions of years. Environmental problems have a cultural and social context. Human survival depends on developing practices that will achieve sustainable systems.