Describe causes and methods of controlling water pollution. Max 20

• Domestic effluents; sewage / faeces / urine
• Nitrogeneous wastes / Urea / Uric acid/ Ammonia;
• Garbage; detergent; pollute water.
• Pollution from domestic affluent- controlled by treating domestic wastes / using biotechnology;
• Banning use of phosphate – based detergent;
• Use of plastic pipes – instead of lead pipes.
• Recycling garbage;
• Industrial waste; radioactive wastes;
• Industrial wastes have heavy metals which include lead/ zinc / copper/
• Chromium mercury;
• Treating industrial wastes; Carrying out environmental assessment before establishing industries;
• Hot water; cooling hot water;
• Oil spills; controlled by cleaning oil spills/ Biotechnology; 
• Penalising industrial / Industries / companies causing pollutions;
• Agrochemicals; such inorganic fertilizers; herbicides/Insecticides/ Pesticides / Fungicides;
• -Pollution due to agrochemicals – controlled by mechanical control of weeds; biological control of weeds / pests; use of biodegradable organic fertilizer / herbicides/ insecticides/ organic farming/ Educating farmers on correct amout of agrochemicals;
• Silting; soil erosion; controlled by appropriate farming practices / contour farming/ reforestation/ building gabions/ terracing; 

Total 27 Max 20