| INTRODUCTION | PROBLEMS - Module 1 - Introduction | PROBLEMS - Module 1 - Introduction | 196 |
| AIR POLLUTION CONTROL | PROBLEMS - Module 2 - Air Pollution Removal | PROBLEMS - Module 2 - Air Pollution Removal | 102 |
| WATER POLLUTION CONTROL BY PHYSICO-CHEMICAL AND ELECTROCHEMICAL METHODS | PROBLEMS - Module 3 - Water Pollution Control by Physico-Chemical and Electrochemical Methods | PROBLEMS - Module 3 - Water Pollution Control by Physico-Chemical and Electrochemical Methods | 104 |
| WATER POLLUTION CONTROL BY BIOLOGICAL METHODS | PROBLEMS - Module 4 - Water Pollution Control by Biological Methods | PROBLEMS - Module 4 - Water Pollution Control by Biological Methods | 78 |
| SOLID DISPOSAL | PROBLEMS - Module 5 - Solids Disposal | PROBLEMS - Module 5 - Solids Disposal | 38 |