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Ill effects of humanIll effects of humanactivities onactivities on

environmentenvironment

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Population growthPopulation growth

IndustrializationIndustrialization Burning fuelsBurning fuels

NonNon--renewablerenewable

fossil resourcesfossil resources

Increased COIncreased CO22levelslevels

PollutionPollution

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DeforestationDeforestation Population growthPopulation growth

leads to the loss ofleads to the loss of

natural habitatsnatural habitats

Cut down trees toCut down trees to

build new homesbuild new homes

Loss of biodiversityLoss of biodiversity

Loss of oxygenLoss of oxygenproducers and COproducers and CO22eliminatorseliminators

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DDT and BIOACCUMULATIONDDT and BIOACCUMULATION

DDT can causeDDT can causecancercancerandis majorlyandis majorlyharmfulto wildlife,harmfulto wildlife,paricularlyparicularly birdsbirds

DDT maybedirectlyDDT maybedirectlygenotoxicgenotoxic,but may,but mayalsoinduceenzymesalsoinduceenzymesto produceotherto produceothergenotoxicgenotoxicintermediatesandintermediatesandDNAadductsDNAadducts

Accumulation ofAccumulation ofsuch pesticides insuch pesticides intop predators startedtop predators startedhaving lethal effects.having lethal effects.

It also endangeredIt also endangeredmany species ofmany species ofbirds, Including ourbirds, Including ourBald Eagles.Bald Eagles.

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POLLUTIONPOLLUTION

Typesof PollutionTypesof Pollution

AirPollutionAirPollution

WaterPollutionWaterPollution

Soil PollutionSoil Pollution

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AirpollutionAirpollution

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1.1. CombustionCombustion ::--

Thetechniqueof combustionisused forThetechniqueof combustionisused forcontrolling air pollutioninthose cases wherethecontrolling air pollutioninthose cases wherethe

pollutantsareinthe form oforganic gasesorvapors.pollutantsareinthe form oforganic gasesorvapors.2.2. AbsorptionAbsorption ::--

Intheabsorption method,the pollutedairIntheabsorption method,the pollutedaircontaining gaseous pollutantsis passedthrough acontaining gaseous pollutantsis passedthrough a

scrubber (ortank) containing asuitableliquidscrubber (ortank) containing asuitableliquidabsorbent. Theliquidabsorbsthe harmful gaseousabsorbent. Theliquidabsorbsthe harmful gaseouspollutants presentinair.So,theaircoming outofpollutants presentinair.So,theaircoming outofscrubberis free from pollutantsanditsdischargedscrubberis free from pollutantsanditsdischargedintotheatmosphere.intotheatmosphere.

PreventionandControlOfAirPreventionandControlOfAir

PollutionPollution

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WaterpollutionWaterpollution

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Acidification of WaterAcidification of Water

BodiesBodiesDissolving CO2 in seawater increasesthe hydrogen ion concentration in the

ocean, and thus decreases ocean pH

Lakes and ponds can become so acidified

that no life can live in them!

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1.Industrial wastesshouldbetreated chemicallyto1.Industrial wastesshouldbetreated chemicallytoneutraliseneutralise

the harmfulsubstances presentinthem,beforethe harmfulsubstances presentinthem,before

discharging intorivers.discharging intorivers.

2.Waste paper, plastics, waste food materialsandrotting2.Waste paper, plastics, waste food materialsandrottingfruitsand vegetablesshouldnotbethrownintoopenfruitsand vegetablesshouldnotbethrownintoopen

drains.drains.

3.Solid wasters containorganic matterandeffluents from3.Solid wasters containorganic matterandeffluents from

distilleriesshouldnotbethrowninto waterbodies. Thesedistilleriesshouldnotbethrowninto waterbodies. These

shouldbesenttobiogas plants.shouldbesenttobiogas plants.

4. Ifasourcesof water gets polluted with oil,then theoil4. Ifasourcesof water gets polluted with oil,then theoil

slick formedshouldbeskimmedof from itsasurfaceslick formedshouldbeskimmedof from itsasurface

with the help ofsuctiondevice.Saw dust canalsobewith the help ofsuctiondevice.Saw dust canalsobe

spreadoveroilslicktoabsorb as much oilas possible.spreadoveroilslicktoabsorb as much oilas possible.

PreventionandControlOfWaterPreventionandControlOfWater

PollutionPollution

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The contaminationofsoil ( orland) with solid waste,The contaminationofsoil ( orland) with solid waste,

acidrain,excessof fertilizers,insecticidesandacidrain,excessof fertilizers,insecticidesand

herbicidesis calledsoil pollution ( orlandherbicidesis calledsoil pollution ( orland

pollution).pollution).

SourcesofSoil PollutionSourcesofSoil Pollution

1.1.Solid wastesSolid wastes

2.2. AcidrainAcidrain

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Acid RainAcid Rain releases sulphatesreleases sulphates

Burning of fossilBurning of fossil

fuels and nitratesfuels and nitrates

into airinto air

Sulphates andSulphates and

nitrates mix withnitrates mix with

water vapor in airwater vapor in air

and form sulphuricand form sulphuric

acid and nitric acidacid and nitric acid

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Preventionofsoil pollutionPreventionofsoil pollution

Clearing,terracing orlevelling oftheland;Clearing,terracing orlevelling oftheland;

Decontaminationof pollutedlandDecontaminationof pollutedland

LandrehabilitationafterindustrialorminingLandrehabilitationafterindustrialorminingusageusage

DrainageandirrigationsystemsDrainageandirrigationsystems

Combating desertificationCombating desertification

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Global warming: CausesandGlobal warming: Causesand

effectseffects Burning fuelssuch as coil,Burning fuelssuch as coil,

oil productsetc producesoil productsetc produces

green house gasesingreen house gasesin

largeamountlargeamount Some predictionsoflocalSome predictionsoflocal

changesincludechangesinclude

increasingly hotsummersincreasingly hotsummers

andintensethunderstormsandintensethunderstorms

Damaging weatherDamaging weather

phenomena causeanphenomena causean

increaseineconomic andincreaseineconomic and

health problems.health problems.

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Review

Population growthPopulation growth DeforestationDeforestation

DDT and BioaccumulationDDT and Bioaccumulation

OzonedepletionOzonedepletion Typesof pollutionTypesof pollution-- causesandcausesand

preventionprevention

AcidrainAcidrain Acidificationof waterbodiesAcidificationof waterbodies

Global warmingGlobal warming

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PRESENTED BY:

SNEH

AH

OUSE

GUIDED BY: MRS.SUSHMACHUGH

CREATED BY:

ABHISHEKAGGARWAL

AAYUSHICHAUHAN