Endangered Endangered EcosystemEcosystem

20062006

POLLUTIONPOLLUTION

Pollution is an undesirable change in the chemical, physical, or Pollution is an undesirable change in the chemical, physical, or biological characteristics of nature.biological characteristics of nature.

PollutantPollutant• Substance that is present in an excessive amount in the Substance that is present in an excessive amount in the

environment asa result at human activities.environment asa result at human activities.• Pollutants have damaging effects on health.Pollutants have damaging effects on health.• They are also harmful to other living organisms.They are also harmful to other living organisms.

Types of pollutionTypes of pollution

• Air pollution.Air pollution.• Water pollution.Water pollution.• Thermal pollution.Thermal pollution.• Noise pollution.Noise pollution.

AIR POLLUTIONAIR POLLUTION

A B

Identify the different of these two pictures.

AIR POLLUTIONAIR POLLUTION

• Air pollution occurs when pollutants Air pollution occurs when pollutants including smoke,dirt,dust and including smoke,dirt,dust and poisonous gases are released into poisonous gases are released into the air endengering humans” lives the air endengering humans” lives and other living organisms.and other living organisms.

What is the sources of air What is the sources of air pollution?pollution?

THE SOURCES AND EFFECTS OF AIR POLLUTANS

Sources Pollutants Effect on human health

FactoriesSulphurdioxide

Nitrogen oxides

Dirt dust

-Irritates eyes-Destroy lung cell-Corrodes the skin-Skin discoses

-Bronchitis-Lowers body resistance to lung disease-Smarting eyes

- Cause asthma attack

THE SOURCES AND EFFECTS OF AIR POLLUTANS

Source Pollutants Effects

MotorisedVehicles

Lead

Smoke andSoot

Hidro carbon

Carbon Monoxide (CO)

-Anemia-Brain retardation for children-Coma or death

-Lung cancer-Breathing difficulties-Conjunctivitis

-Cell mutation-Lung cancer

-Delayed thinking-Cause death

Effects of Air Pollution .Effects of Air Pollution . Building and propertyBuilding and property

• Sulphur dioxide,oxides of Sulphur dioxide,oxides of nitrogen,nitrogen dioxide causes acid nitrogen,nitrogen dioxide causes acid rain, corrode and weaken buildings.rain, corrode and weaken buildings.

• Dust, smoke, fumes dirty building.Dust, smoke, fumes dirty building.

• Oxides of nitrogen cause fading of Oxides of nitrogen cause fading of colours. colours.

Effect of Air Pollution Effect of Air Pollution On AgricultureOn Agriculture

• Toxic gases lowers plant resistance Toxic gases lowers plant resistance towards diseases.towards diseases.

• Destroys plant tissueDestroys plant tissue

• Failure to produce Failure to produce chlorophyll(chlorosis)chlorophyll(chlorosis)

• Acd rain lowers soil acidity,makes Acd rain lowers soil acidity,makes soil unsuitable for farming.soil unsuitable for farming.

Effects of air pollution on Effects of air pollution on weatherweather

• Sulphur dioxide, nitrogen dioxide, Sulphur dioxide, nitrogen dioxide, oxides of nitrogen cause acid rain.oxides of nitrogen cause acid rain.

• Smoke and haze cause high Smoke and haze cause high temperature and unclear vision.temperature and unclear vision.

• Carbon dioxide raises Earth”s Carbon dioxide raises Earth”s temperature,causes greenhouse-temperature,causes greenhouse-effect and polar ice melts causing effect and polar ice melts causing floods.floods.

WATER POLLUTIONWATER POLLUTION

• Disharging industrial Disharging industrial wastes,agriculture waste,dosmetik wastes,agriculture waste,dosmetik wastes and sewage into rivers wastes and sewage into rivers contribute to water pollution.contribute to water pollution.

• Thus,causing the water to be unsafe Thus,causing the water to be unsafe for human’s can consumption as well for human’s can consumption as well as endangering the lives of aquatik as endangering the lives of aquatik organisms.organisms.

SOURCES OFWATER POLLUTION

DOEMESTIC WASTEAGRICULTURAL

WASTE

NON BIODEGRADABLE

WASTE

INDUSTRIAL WASTE

OIL SPILLAGEAT SEA

SOURCES OF WATER POLLUTION

THE EFFECT OF WATER THE EFFECT OF WATER POLLUTION TO LIFEPOLLUTION TO LIFE

•DOEMESTIC WASTE DOEMESTIC WASTE DISCHARGED INTO DISCHARGED INTO SEWERAGE SYSTEM BREEDS SEWERAGE SYSTEM BREEDS HARMFUL BACTERIAL TO LIFEHARMFUL BACTERIAL TO LIFE. .

• INDUSTRIAL WASTE SUCH AS INDUSTRIAL WASTE SUCH AS MERCURY, ARSENIC AND CADMIUM MERCURY, ARSENIC AND CADMIUM ARE HARMFUL TO HUMAN HEALTHARE HARMFUL TO HUMAN HEALTH

• WATER POLLUTION KILLS AQUATIC WATER POLLUTION KILLS AQUATIC PLANT. AQUATIC ANIMALS THAT PLANT. AQUATIC ANIMALS THAT FEED ON AQUATIC PLANT WILL FEED ON AQUATIC PLANT WILL GRADUALLY EXTINCT. GRADUALLY EXTINCT.

• OIL SPILLAGE AND RUBBISH OIL SPILLAGE AND RUBBISH FLOATING ON TOP OF WATER FLOATING ON TOP OF WATER REDUCE OXYGEN AND SUN RAYS REDUCE OXYGEN AND SUN RAYS PENETRATION TO AQUATIC PLANT PENETRATION TO AQUATIC PLANT AND ANIMALS AND BADLY AFFECTED AND ANIMALS AND BADLY AFFECTED THEIR SURVIVAL. THEIR SURVIVAL.

EUTROFICATION :EUTROFICATION :• DISCHARGE OF AGRICULTURAL DISCHARGE OF AGRICULTURAL

WASTE INTO THE WATER SYSTEM WASTE INTO THE WATER SYSTEM INCRESAES ALGAE PLANT. INCRESAES ALGAE PLANT.

• DECOMPOSITION OF ALGAE TAKES A DECOMPOSITION OF ALGAE TAKES A LARGE AMOUNT OF OXYGEN. LARGE AMOUNT OF OXYGEN.

• THE B.O.D. THEN INCREASES AND THE B.O.D. THEN INCREASES AND BADLY AFFECTED AQUATIC LIFE.BADLY AFFECTED AQUATIC LIFE.

EXERCISEEXERCISE

1.1. Give five sources of Give five sources of pollution.pollution.

2. Explain the process of 2. Explain the process of Eutrofication. Eutrofication.

Effects of a greenhouse Effects of a greenhouse effecteffect

Thinning of the ozone layerThinning of the ozone layer

Effect of thinning of the ozone Effect of thinning of the ozone layerlayer

The Importance of Proper Management The Importance of Proper Management of Development Activities and the of Development Activities and the EcosystemEcosystem

• Among the measures are:Among the measures are:

• Implementation of lawImplementation of law

• Use of technologyUse of technology

• EducationEducation

• Preservation and conservationPreservation and conservation

• Biology controlBiology control

• Efficient use of energyEfficient use of energy

ExerciseExercise

ThanksThanks