Introduction Definition. Development of Environmental Geotechnology. Aims of Environmental Geotechnology. Environmental Cycles and Their Interaction with Geotechnology. Man-Made Environment. Acid Rain and Acid Drainage. Environmental Geotechnical Problems. Pollution Processes and Soil-Pollution Interaction. Methods for Analysis of Environmental Geotechnical Problems. Scope and Organization of the Text. Summary. Problems. Particle Energy Field Theory and Its Application Introduction. The Concept of Particle Energy Field Theory. Energy, Energy Field and Particle Energy Field. The States of Aggregation of Idealized Particles. Crystal - A True Solid. Granular Particles and Their Packing Characteristics. Chemical Fundamentals. Phenomena of Solid-Liquid-Gas at Interface. Particle Behavior Under Load - Mechanical Energy Field. Multi-Media Energy Field. Justification for Application to Geotechnology. Summary. Problems. Nature of Soil and Environment Soil as a Natural Genetic System . Soil as a Polydisperse System. Soil Texture, Strata, Horizon and Profiles. Identification and Classification Systems of Soil. USDA Soil Classification System. Chemical Composition of Natural Soil and Clay Fraction. Granular Soils. Identification and Characterization of Contaminated Soils. Classification of Contaminated Soils. Dust: Microscopic Debris. Suspension: Dust in the Water. Summary. Problems. Soil Technology Introduction. Soil Mineralogy. Structural Units of Soils. Size and Shape Measurements. Particle Bonds and Linkages. Inter-Particle Energies and Forces. Particle Arrangement and Clay Structures. Ion Exchange Reaction in Soil-Water Systems. The Clay-Water-Electrolyte System. Characteristics and Structures of Some Typical Clay Minerals. Hydrophobic and Hydrophillic Soils. Homoionic Soil: Pure Soil. The Man-Made Soil. Summary. Problems. Soil-Water-Air Interaction in the Environment Introduction. Nature of Water. Properties of Water and Water Substances. Solutions , Compounds, Mixtures and Electrolytes. Types and Sources of Waters. Electrochemical Characteristics of Soil-Water System. Soil-Water Interaction in the Thermal Energy Field. Soil-Water Interaction in the Electric Energy Field. Geomorphic Processes (Aging Process). Corrosion Process. Effect of Bacteria on Behavior of Soil-Water System. Sensitivity of Soil to Environment. Soil-Water-Air Interaction. Summary. Problems. Shrinkage, Swelling and Cracking Characteristics of Soil Introduction. Shrinkage Characteristics. Swelling Characteristics. Sorption Characteristics. Adsorption Phenomena. Cracking Phenomena and Mechanisms. Tensile Characteristics of Soil. Fracture Characteristics of Soil. Summary. Problems. Hydraulic Conductivity and Mass Transport Phenomena Introduction. Capillarity. Hydraulic Conductivity. Infiltration, Percolation and Retention. Mass Transport Phenomena. Osmotic and Reversed Osmotic Phenomena. Soil-Water Suction and Diffusivity. Moisture Migration.