Science

1. WATER POLLUTION
ITS CAUSES, EFFECTS, PREVENTION
AND PRESERVATION

2. WHAT IS
POLLUTION?
wate
r
ai
r
sound
so
il
Pollutio
n

3. POLLUTION
The degradation in the quality of
water due to mixing of harmful
and unnecessary substances in
water resources

4. CAUSES OF
WATER
POLLUTION

5. EFFECTS OF WATER POLLUTION

6. PREVENTION OF
WATER POLLUTION

7. MEASURES OF CONSERVATION
OF WATER RESOURCES

8. WATER QUALITY
INDEX

9. A presentation
by:
1.Anshu
Ghimire
2.Arjian Aryal
3.Asmita
Neupane
4.Barbim