PEMELIHARAAN DAN PEMELIHARAAN DAN PEMULIHARAAN ALAM PEMULIHARAAN ALAM

SEKITARSEKITAR

KESEIMBANGAN ALAMKESEIMBANGAN ALAMKITARAN NITROGENKITARAN NITROGEN

KITARAN NITROGENKITARAN NITROGEN

KITARAN KARBONKITARAN KARBON

KITARAN KARBONKITARAN KARBON

KITARAN AIRKITARAN AIR

KITARAN AIRKITARAN AIR

SIRATAN DAN RANTAI SIRATAN DAN RANTAI MAKANANMAKANAN

(Aliran Tenaga)

PIRAMID NOMBORPIRAMID NOMBOR

PRODUCERPRODUCER

PRIMARYPRIMARY

SECONDARYSECONDARY

TERTIARYTERTIARY

PIRAMID TENAGAPIRAMID TENAGA

PRODUCER (5000 kJ)PRODUCER (5000 kJ)

PRIMARY PRIMARY (3000 kJ)

SECONDARY SECONDARY (1000 kJ)

TERTIARY TERTIARY (500 kJ)

ENERGY ENERGY DECREASEDECREASE

BENCANA ALAMBENCANA ALAM

TSUNAMITSUNAMI PUTTING BELIUNGPUTTING BELIUNG RIBUT TAUFANRIBUT TAUFAN GEMPA BUMIGEMPA BUMI BANJIRBANJIR LETUSAN GUNUNG BERAPILETUSAN GUNUNG BERAPI

Kesan Bencana AlamKesan Bencana Alam

PENCEMARAN ALAMPENCEMARAN ALAM

Peningkatan kuantiti bahan pencemar yang Peningkatan kuantiti bahan pencemar yang mengakibatkan perubahan fizikal atau mengakibatkan perubahan fizikal atau kimia dalam alam sekitar.kimia dalam alam sekitar.

PUNCA PENCEMARANPUNCA PENCEMARAN

BINCANGKAN BAHAN PENCEMAR BINCANGKAN BAHAN PENCEMAR UTAMA DAN KESAN KEPADA ALAM UTAMA DAN KESAN KEPADA ALAM SEKITARSEKITAR

THE EFFECTSTHE EFFECTS

HUMAN’S HEALTHHUMAN’S HEALTH DESTRUCTION OF HABITATS AND DESTRUCTION OF HABITATS AND

NATURENATURE EXTINCTION OF SPECIESEXTINCTION OF SPECIES LOSS OF ECONOMIC RESOURCESLOSS OF ECONOMIC RESOURCES GREEN HOUSE causes GLOBAL GREEN HOUSE causes GLOBAL

WARMINGWARMING ACID RAINACID RAIN OZONE DEPLETIONOZONE DEPLETION

GREENHOUSE EFFECTGREENHOUSE EFFECT

CAUSE BY HEAT BEING TRAPPED ON CAUSE BY HEAT BEING TRAPPED ON EARTH BY THE GASES IN THE EARTH BY THE GASES IN THE ATMOSPHEREATMOSPHERE

EXAMPLE OF GASES:EXAMPLE OF GASES: CARBON DIOXIDECARBON DIOXIDE CARBON MONOXIDECARBON MONOXIDE NITROGEN DIOXIDENITROGEN DIOXIDE SULPHUR DIOXIDESULPHUR DIOXIDE

Effect of GHE is Global Effect of GHE is Global WarmingWarming

The increase in the average temperature The increase in the average temperature of the Earth atmosphereof the Earth atmosphere

Effect the melting of ice caps and Effect the melting of ice caps and glaciers and causes the rise of the sea glaciers and causes the rise of the sea levellevel

Ozone DepletionOzone Depletion

Ozone layer consists of a Ozone layer consists of a layer of gas (Olayer of gas (O33))

Function Function block the UV block the UV rays from reaching rays from reaching the Earth surfacethe Earth surface

Depletion cause by due the ozone Depletion cause by due the ozone depleting subtances :depleting subtances : CFC CFC HCFC (more safety than CFC) HCFC (more safety than CFC) Halons (fire extinguishing)Halons (fire extinguishing)

Effect Ozone depletionEffect Ozone depletion

Skin cancerSkin cancer Cataract Cataract Drastic change of climateDrastic change of climate Lower immunityLower immunity MutationMutation Reduce the cropReduce the crop Kill phytoplanktonKill phytoplankton

Acid RainAcid Rain

Toxic gases dissolves in rain waterToxic gases dissolves in rain water Occur in factories areaOccur in factories area Example of gases:Example of gases:

Nitrogen dioxideNitrogen dioxide Sulphur dioxideSulphur dioxide Carbon dioxideCarbon dioxide Carbon monoxideCarbon monoxide

Effect of acid rainEffect of acid rain

Corrode the structure of building, carCorrode the structure of building, car Retards the photosynthesis and killed the Retards the photosynthesis and killed the

plantplant Kill phytoplanktonKill phytoplankton

PRESERVE AND CONSERVEPRESERVE AND CONSERVE

CONTROLL THE USE OF FOSSIL FUELCONTROLL THE USE OF FOSSIL FUEL CONTROLL AMOUNT OF INDUSTRIAL CONTROLL AMOUNT OF INDUSTRIAL

WASTEWASTE CONTROLL EMISSIONS FROM VEHICLES CONTROLL EMISSIONS FROM VEHICLES

AND MACHINERYAND MACHINERY PROPER USE OF PESTICIDESPROPER USE OF PESTICIDES CONTROLLING GARBAGE DISPOSALCONTROLLING GARBAGE DISPOSAL CONTROLLING SEWAGE WASTECONTROLLING SEWAGE WASTE STOPING THE USE OF CFCSTOPING THE USE OF CFC

Proper managementProper management

Protecting our rainforestProtecting our rainforest Stopping overfishingStopping overfishing Using land properlyUsing land properly Planning proper miningPlanning proper mining

Discuss in Discuss in groupgroup1.1. List the four sources of environmental pollutionList the four sources of environmental pollution2.2. what are the effects cause by environmental what are the effects cause by environmental

pollution?pollution?3.3. What does global warming mean?What does global warming mean?4.4. How are the greenhouse effect and global How are the greenhouse effect and global

warming related? what are the chemicals that can warming related? what are the chemicals that can cause global warming?cause global warming?

5.5. what is the ozone layer?what is the ozone layer?6.6. why is the ozone layer importance?why is the ozone layer importance?7.7. what are the chemicals that can damage the what are the chemicals that can damage the

ozone layer?ozone layer?8.8. where can these chemicals be found?where can these chemicals be found?9.9. How does a damaged ozone layer affect us and How does a damaged ozone layer affect us and

other living things on Earth?other living things on Earth?

Preservation and Preservation and conservationconservation