Environmental Environmental PPollutionollution

Name: Tan Chai Shiuan (29) Chee Hui Fen (7)

Class: 2A2

Band: Band 6

Where is Water Come From

Lakes Rivers Oceans Aquifers Groundwater Rain Water Snow

Water Pollution

Water pollution is the contamination of water bodies. Water pollution occurs when pollutants are directly or indirectly discharged into water bodies without adequate treatment to remove harmful copounds.

Water pollution affect plants and organism living in these bodies of water. In almost all cause the affect is damaging not only to individual species and popuations, but also to the natural biological communities.

Types of Pollution - Pollutants

Industrial waste - Toxic chemicals - Radioactive residues

Domestic waste - Garbage or litter - Untreated sewage Agricultural waste - Excessive fertilisers

- Pesticides Siltation - Mud, silt, sand and other solids in the oil Accidental spillage - Oil

Effect of the pollution

Death of aquatic (water) animals Disruption of food-chain Diseases Destruction of ecosystems

Industrial Waste

Mercury, lead and heavy metals accumulate in the body of aquatic animals through the food chain, poisoning these animal.

Radioactive subtanes can cause cancer. Some chemicals can cause skin diseases or harm

our body system.

Domestic Waste

A person who dinks water polluted with domestic waste may suffer from cholera, dysentery and typhoid.

If the water is used for bathing, it can cause skin disease

Aquatic organism die lack of oxygen

Agricultural Waste

Algae grow fast in water polluted by fertilisers. They form a thick layer on the water surface and block sunlight from reaching the aquatic plants.

Aquatic plants die as they cannot make food.

Bacteria that decompose the dead plants multiply and use up oxygen in the water and causes death of aquatic organism due to oxygen shortage.

Siltation

Mud and silt cause rivers to become shallow and hene, falsh floods will occur more frequently.

Mud also block sunlight from reaching the aquatic plants and disrupts photosynthesis. These plants will soon die.

Accidental Spillage

The oil layer block oxygen fro dissolving into the water and deprive aquatic organism of oxygen.

As oil is toxic, it kills fishes and sea birds. The beach will also be polluted with oil and

organism living in the seshore will be affected as well.

Ways to Control the Pollution

stop smoking or at least follow the "No Smoking" sign

use unleaded gasoline in your cars keep your car propely maintained to keep it in

good running condition to advoid smoke emissions

share a ride or engage in car pooling

choose to walk or ride a bicycle never use open fires to dispose of wates adopt the 3R of solid waste such as, reduce, reuse,

recycle prevention, monitoring, enforcement waste products have be treated beore they are

disposed of

educate the public n ways to pevent water pollution

enfore laws use biodegradable detergents rubbish should be placed in sealed bags deforestation must be prevented