This course targets graduate students from various disciplines that work with chemical and physical processes in natural subsurface. This includes, for example, petroleum and natural gas engineering, geosciences, environmental engineering, agricultural engineering, civil engineering, chemical engineering, and applied mathematics. The course teaches fundamental concepts that are important in understanding subsurface reactive transport processes, as well as their quantitative representation and application. Covered topics include, for example, (bio)geochemical thermodynamics and kinetics, contaminant transport, and reactive transport coupling. Depending on the studentså interests, the course will discuss the applications of the principles in understanding and quantifying chemical weathering processes, environmental (bio)remediation, geological carbon sequestration, and reservoir souring.Ò