1. Introduction 2. Properties of Reservoirs/Caprock and Co2 3. Geological Sequestration of Co2 in Deep Saline Aquifers 4. Co2 Storage in Basaltic Reservoir 5. Co2 Enhanced Oil Recovery (Co2-Eor) 6. Co2 Enhanced Gas Recovery (Co2-Egr) 7. Co2 Enhanced Geothermal System Recovery (Co2-Egs) 8. Co2 Enhanced Shale Gas Recovery (Co2-Esgr) 9. Co2 Enhanced Water Recovery (Co2-Ewr)