Q.X.Muftaydinov, H.M.Qodirov, E.Yu.Yulchiyеv Ekologiya.
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§-XI.3. Hydrosphere pollution.
§-XI.4. The main problems with the use of water resources.
Chapter 12. Wastewater and its types.
§-XII.1. Concept of wastewater.
§-XII.2. Classification of wastewater by various characteristics.
Chapter 13. Wastewater treatment methods.
§-XIII.1. The main methods (mechanical, physico-chemical, chemical, biological)
of wastewater treatment.
§-XIII.2. Systems and facilities for wastewater treatment.
Chapter 14. The lithosphere. Soil degradation.
§-XIV.1. Soil, its significance and role in living organisms.
§-XIV.2.
Soil erosion, its types and methods of erosion control.
§-XIV.3.
Clean zone program, its content, goals and objectives.
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