1. ENV 103 Final presentation
Topic : water pollution in Dhaka city Section : 1 Name of the group members : Sakia Binte Azam ( ) Bushra Binte Rashid ( ) Rezwana Islam ( ) Shahla Samim Shamma ( )

2. Water pollution in Dhaka city

3. What is water pollution..??
Contamination of water (anthropogenic contamination)
Natural pollution (disaster, acid rain)
Artificial pollution (human created contamination)

4. Different Causes of Water Pollution
Sewerage pollution: when untreated sewerage entering rivers or any kind of water.
Petroleum pollution: occurs because of petroleum product like; oil ,gasoline
Enters in water from ship, launch, factories, oil tankers.

5. Different Causes of Water Pollution
Solid waste: it is illegally dumping of garbage, old tires, other solid waste into water.
Solid waste features are that it is unsightly, slow to degrade or some time it is non degradable.
Toxic chemical: industrial plants produce many harmful chemical substance like; polychlorinated biphenyls (PCBs), mercury, tributyltin (TBT) are dumped illegally in water.

6. Different Causes of Water Pollution
Industrial factors: rapid and unplanned industrialization, brickfield development, Dying factories, tanneries, Grabbing up the river.
Domestic factors: using detergents for washing, unhygienic open latrines, pesticides used in gardens can also pollute water.

7. Different Causes of Water Pollution
Eutrophication: nutrients enrichment (such as phosphates and nitrate) of rivers and lakes due to wastewater effluent , untreated sewage, septic tank leachate .
leads to increase of algae(algal bloom)
Reduce dissolved oxygen
Fish kills, water becomes poisonous, undrinkable and unusable

8. Effects of water pollution
Effects on human health
Effects on ecosystem
Effects on other plants and animals
Economical effects

11. Effects on Ecosystem:
Damage to the reproductive system in the wildlife ecosystem. 
Low levels of oxygen
Kills the phytoplankton, fishes and fish eating birds

12. Effects on Animal Health:
Fishes and the aquatic organisms are killed
suffocation in fish and birds. 
Also effects on plant causing different diseases
Example: ozone diseases of potato leaves

13. Effects on Economy financial implications:
financial implications
High loss in fish depending business

14. solution Prevention of water pollution: ➡What we can do
1 Turn of running water 2 Be cautious of what you pour in the sink/ flash down t the oilet 3 Do not throw those thing in to the water which is harmful water 4 Fertilize correctly 5 Participate in a clean up 6 Spread awareness 7 Plant tree 8 use environmentally safe cleaning liquids
➡Governments, local councils and laws

15. Conclusion
Every one of the city should be careful to prevent water pollution and make sustainable water for all

16. Thank you