Introduction to Environmental Engineering and Science. Lecture 01 : Sustainability Concepts - Innovations and Challenges. Lecture 02 : Sustainability Concepts - Innovations and Challenges. Lecture 03 : Basics and Sustainability Concepts and Evolution. Lecture 04 : Engineering for Sustainability. Lecture 05 : Life Cycle Thinking and Circular Economy. Lecture 06 : Mass Concentration Units. Lecture 07 : Partial Pressure Units. Lecture 08 : Other Types of Units. Lecture 09 : Units (Contd.), Qualitative and Quantitative Measurements. Lecture 10 : Quantitative Measurements Basics. Lecture 11 : Ecology. Lecture 12 : Energy Flow and Ecological Concepts. Lecture 13 : Population. Lecture 14 : Population, Consumption and Biodiversity. Lecture 15 : Environmental Chemistry. Lecture 16 : Mass Balance and Reactor Systems. Lecture 17 : Mass Balance in Continuous Reactor. Lecture 18 : Plug Flow Reactor and Energy Flow. Lecture 19 : Energy Balance and Earth Overshot Day. Lecture 20 : Mass Transport Processes. Lecture 21 : Oxygen Demand in Environmental Systems. Lecture 22 : BOD Examples, Oxygen Levels in Surface Waters, COD. Lecture 23 : Environmental Health Basics and SDGs. Lecture 24 : Field Applications. Lecture 25 : Nutrient Cycle. Lecture 26 : Environmental Risk. Lecture 27 : Risk Assessment Steps and EIA Introduction. Lecture 28 : Environmental Risk Assessments with Concepts of EIA and LCA. Lecture 29 : Environmental Risk Assessments with Concepts of EIA and LCA (Contd.). Lecture 30 : Environmental Risk Assessments with Concepts of EIA and LCA (Contd.). Lecture 31 : Water Quantity. Lecture 32 : Water Availability and Usage. Lecture 33 : Population Forecasting. Lecture 34 : Water Quality. Lecture 35 : Water Quality (Contd.). Lecture 36: Plain Sedimentation. Lecture 37: Coagulation. Lecture 38: Review of Sedimentation and Rapid Sand Filtration. Lecture 39: Disinfection and Water Supply. Lecture 41: Wastewater collection and characterization. Lecture 42: Sewerage System and Sewage Characteristics. Lecture 43: BOD Concepts and Preliminary Treatment of Wastewater. Lecture 44: Wastewater Treatment - I. Lecture 45 : Activated Sludge Process and Sludge Disposal. Lecture 46 : Introduction to Solid Waste Management. Lecture 47 : Introduction to Solid Waste Management (Contd.). Lecture 48 : Components of Solid Waste Management. Lecture 49 : Collection and Treatment. Lecture 50 : Waste Disposal and Summary. Lecture 51 : Basics of Air Pollution Issues - Global and Local. Lecture 52 : Air Pollutants and Air Pollution Index. Lecture 53 : Global Warming and Climate Change. Lecture 54 : Air Pollution Models. Lecture 55 : SDGs, Noise and Soil Pollution. Lecture 56 : Present Issues and Few Case Studies. Lecture 57 : Case Study - Solid Waste Management. Lecture 58 : Case Study - Industrial Pollution and Disasters. Lecture 59 : Case Study - Global Food Waste Initiatives. Lecture 60 : Case Study - Global Food Waste and Resource Recovery. Tutorial I. Tutorial II.