Man is his own enemy.pptx

8/9/2019 Man is his own enemy.pptx

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By Khushi Jain 8C andBhawika Jain 6A

MAN IS HISOWN ENEMY!


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ELECTRICITY

We use electricity everyday and thus produce

carbon dioxide exceedingly which is turning out to

be an extremely grave problem.


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Water pollution can be caused by communities or

!actories dumping waste into oceans" rivers and

la#es. Waste includes things we don$t need any more

and want to throw away" such as garbage and

harm!ul chemicals. Water pollution can #ill plant

and animal li!e and can ma#e drin#ing water unsa!e.

WATER POLLUTION


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Cars and !actories create air pollution. When carengines burn gasoline" they give o% poisons that ma#e the

air dirty. &ome o! the smo#e that comes !rom !actories alsopollutes the air. This type o! pollution is harm!ul to plantsand animals" including people. &cientists are wor#ing onways to cut bac# air pollution by inventing new carengines and new types o! !uel that produce cleaner air.

AIR POLLUTION


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'ir pollution ma#es the air hard to breathe

because o! the lac# o! oxygen. It can hurt our lungs

and sting our eyes. &ometimes pollution can

wea#en or #ill trees and other plants. It can even

wear away the stone in buildings. I! this pollution

gets into the water o! la#es and streams" it canharm animal and plant li!e there.

AIR POLLUTIONAFFECT


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(actories that have to use dangerous materials can use

)lters. These )lters can catch the poison be!ore they get

into the air. *angerous wastes !rom communities and

!actories don$t have to be dumped on the ground. They

can be destroyed" made harmless or cleaned and used

again. I! they are stored underground" they can be

sealed in special boxes" so they don$t lea# into soil.

FACTORY WASTES


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+any cities in the world" have invested in air ,uality monitoring systems

that continuously measure the amount o! pollutants in the air" as well as

the sa!ety o! air in a given area. These monitoring systems and stations

may use automatic instruments or manual means.

It basically involves drawing air through various tubes with analy-ers

attached" all connected to a data center" where the readings are logged.

In an event o! rising air pollutants" signals are sent to experts. The

experts examine and analyse the data and action is ta#en by the

appropriate authorities to control the situation.

CARBON DIOXIDE LEVELS CHECK


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Warmer conditions ma#e most crops grow !aster but

could also reduce crops such as grains. The e%ect o!

the increased temperature will depend on the crop$s

optimal temperature !or growth and reproduction but

in some areas it may bene)t the types o! crops

typically planted there. igher carbon dioxide levels

can increase yields li#e wheat and soya beans.

POSITIVE AFFECT ONCROPS


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owever" some !actors may counteract these potentialincreases in yield. This means that i! the temperatureexceeds the crops ideal level o! i! there isn$t enough wateror nutrients in the soil then the yield may reduce. Extreme

events such as /oods and droughts can reduce or evenharm crops. The reduction in water supplies may ma#e itmore di%icult and expensive to meet water demands. +anyweeds" pests and !ungi /ourish in warmer temperatures"wetter climates and increased carbon dioxide levels.Currently" !armers spend more than 011 billion per year to)ght weeds in the 2nited &tates. +oreover" increased useo! pesticides and !ungicides may negatively a%ect humanhealth.

NEGATIVE AFFECT ONCROPS


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The icecaps are melting3 This is because solar energy!rom the sun passes through the atmosphere. TheEarth$s sur!ace is heated by the sun and radiates theheat bac# out towards space. &ome energy is re/ectedbac# out to space while green house gases trap some o!the heat and so cause the atmosphere to warm up. Thisis why the ice caps are melting. 4y reducing theamount o! electricity you use you can save us.

Inceasin a"#s$%e&ice"$e&a'&e


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The disposal o! garbage is a ma5or problem in theworld.

I! we throw it into rivers or la#es it will pollute thewater. I! we burn garbage" it will pollute the air.

I! we bury it on land it will pollute ground water andland.

Ga&(ae


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4y using the 6 R$s we can reduce garbage.

They are7

Reduce the use o! things adding to garbage.

Reuse things as much as possible.

Recycle by7

+a#ing a compost pit 8!or biodegradable waste9

:utting garbage including paper" metal" glass andplastics in the various recycle bins.

THE )RS AREHERE


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v

He&e a&es#"e

$ic'&es


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In the Earth$s crust there is molten roc# also #nown as

magma. +olten roc# is roc#s that have been heated under

the Earth and have melted into a li,uid. This can be !ound

about 1;


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+oving water has #inetic energy. This can

be trans!erred into use!ul energy in

di%erent ways. ydroelectric power

8E:9 schemes store water high up in

dams. The water has gravitational potential

energy" which is released when it !alls.

's the water rushes down through pipes"

this stored energy is trans!erred to #inetic

energy" which turns electricity generators.

HEP


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?overnments throughout the world have considered this problem and have

already ta#en action by using green energy. &ome are investing in solar

energy" wind energy and renewable energy to depress the burning o! !ossil!uels. ?overnments are currently !orcing companies to be responsible with

electricity to reduce electricity used by them. Companies are also building

more energy e%icient cars" which pollute less than be!ore.

Encourage your !amily to use the bus" train or bi#e when commuting

instead o! a car. I! we all do this" there will be less cars on road and so less

!umes.

Ta,in aci#n


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4iomass !uels come !rom anything that once lived but now is

dead such as wood products" dried vegetation" a,uatic plants

and even some garbage. This is #nown as natural material.:lants use the &un$s energy to ma#e their !ood in a process

called photosynthesis and the !ood is stored as chemical

energy. When the plants are cut or die energy is trapped in the

residue. We can use this energy but )rst we have to release it.

This is burned to heat water in a boiler to release heat energy

8steam9. The energyApower !rom the steam is directed to

turbines with pipes. The steam turns a number o! blades in the

turbine and generators" which are made o! coils and magnets.

Bi#"ass -'e*s

Man is his own enemy.pptx

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