3.1.3 : Natural 3.1.3 : Natural DisasterDisaster

FloodsFloods

Can cause Can cause erosion and erosion and landslideslandslides

Destroy crops, Destroy crops, livestocks, livestocks, properties and properties and spreads diseasespreads disease

Drought Drought

Land hard and Land hard and drydry

Plants will die Plants will die and will disrupt and will disrupt the food webthe food web

Volcanic eruptionVolcanic eruption

Choking Choking clouds of dust clouds of dust and poisonous and poisonous gasesgases

Can cause Can cause acid rain and acid rain and air pollutionair pollution

Earthquakes Earthquakes

Destroy building, Destroy building, properties, animals, properties, animals, plants and peopleplants and people

Can cause Can cause tsunami, tsunami, hurricanes, hurricanes, typhoons or typhoons or cyclones.cyclones.

Tsunami Tsunami

Hurricane Hurricane

Typhoons Typhoons

Cyclones Cyclones

3.2 3.2 The Source of The Source of Environmental Environmental PollutionPollution

Sources of environmental Sources of environmental pollutionpollution

Uncontrolled used of Uncontrolled used of fossil fuelsfossil fuels Disposal of by-products, waste, toxic Disposal of by-products, waste, toxic

substance, radioactive substance, substance, radioactive substance, smoke and heat from smoke and heat from factoriesfactories

Uncontrolled use of chemical Uncontrolled use of chemical fertilizers, pesticides and fungicides fertilizers, pesticides and fungicides in in agricultureagriculture

Sources of environmental Sources of environmental pollutionpollution

Production of noises, smoke and Production of noises, smoke and poisonous gases from poisonous gases from vehicles vehicles and machineryand machinery

Disposal of Disposal of rubbish and sewagerubbish and sewage Use of chlorofluorocarbon Use of chlorofluorocarbon (CFC)(CFC)

Effects of environmental Effects of environmental pollutionpollution

Human healthHuman health Loss of habitat and change in natLoss of habitat and change in nat

ureure Extinction of speciesExtinction of species Loss of economic resourcesLoss of economic resources

The Greenhouse The Greenhouse EffectEffect

Natural heating processNatural heating process that that occurs when certain gases occurs when certain gases (greenhouse gases)(greenhouse gases) in the in the Earth’s atmosphere Earth’s atmosphere trap heattrap heat..

Greenhouse gasesGreenhouse gases Carbon dioxideCarbon dioxide – main – main

greenhouse gas which come greenhouse gas which come from the burning of fossils fuels from the burning of fossils fuels and deforestationand deforestation

Methane, chlorofluorocarbon Methane, chlorofluorocarbon (CFC), ozone and nitrogen (CFC), ozone and nitrogen oxidesoxides..

Global WarmingGlobal Warming

Average Average global temperatureglobal temperature of Earth of Earth is is risingrising

This could cause extensive melting This could cause extensive melting ice caps and glaciers and raise sea ice caps and glaciers and raise sea levelslevels

It will It will change weather patternschange weather patterns and and effect agricultural output.effect agricultural output.

The Ozone LayerThe Ozone Layer

Ozone layer contains a high Ozone layer contains a high concentration of concentration of ozoneozone and serves and serves to shield living organism from the to shield living organism from the Sun’s harmful energySun’s harmful energy

Ozone absorbs most of the Ozone absorbs most of the ultraviolet radiation that enters the ultraviolet radiation that enters the atmosphere.atmosphere.

PropellantsSpray cans/

aerosols

Styrofoam

Coolant Refrigerators

Air-Conditioner

CFC’s

Effect of Ozone DepletionEffect of Ozone Depletion

Irritation of eyes, throat and lung cancerIrritation of eyes, throat and lung cancer

Reduce the yield of cropsReduce the yield of crops

Sunburn Sunburn

Skin cancerSkin cancer

Cataract Cataract

Mutation - Down’s SyndromeMutation - Down’s Syndrome

Impairs crop and tree growthImpairs crop and tree growth Kill phytoplankton that sustain oceanic Kill phytoplankton that sustain oceanic

lifelife

The Idea of Preservation and The Idea of Preservation and Conservation of the Environment Conservation of the Environment

and Pollution Controland Pollution Control

Preservation Preservation To keep something the same or To keep something the same or

prevent it from being damaged.prevent it from being damaged.

ConservationConservation Carefully using valuable natural Carefully using valuable natural

resources that they will be available resources that they will be available for as long time as possiblefor as long time as possible

The Importance of Proper The Importance of Proper Management of Natural Management of Natural

ResourceResource

Forest reserveForest reserve Develop new technology of fisheriesDevelop new technology of fisheries Monitor an opening of a new landMonitor an opening of a new land Carried out mining activities Carried out mining activities

systematicallysystematically