The content is accessible to sophomore engineering students with content appropriate for upper classmen and working engineers.  In addition to the traditional focal topics in environmental engineering: Air Wastewater Water and Solid Waste, information is included on current reactionary issues such as: Sustainability, Risk Global Air Quality and Public Health   A focus on practical solutions and problem solving backed by relevant theory is maintained throughout.   Many students beginning their engineering studies struggle to critically read textbooks and have difficulty when muddling through example problems.  The focus here is to provide practical example problems that help students comprehend challenging theory and facilitate its real-world application.  Example problems provide a detailed and structured approach to finding a solution; examples will be provided using SI and US units.   Several chapters will contain introductory material appropriate for sophomores as well as more advanced material that might only be appropriate for upper level engineering students.