Chemical fertilizers help improve crop growth and soil quality over 20-30 years but eventually pollute the soil. Increasing population requires greater food production through practices like monocultures that destroy natural habitats. Deforestation exposes soil to erosion, and pollution from sewage, fertilizers, and non-biodegradable plastics contaminates water and soil. Conservation of resources through recycling reduces environmental damage and litter.

1. HUMANAND
ENVIRONMENT

3. CHEMICAL FERTILISERS
#.MANY CHEMICAL USED BY FARMERS
TO IMPROVE THERE GROWTH OF THEIR CROPS
#,CHEMICALS FERTILISERS HELP TO IMPROVE THE SOIL BY ADDING
NITRATE IONS AND ADDING MORE MINERAL TO SOIL BUT FOR 20 TO
30 YEARS ONLY
#,AFTER THE SOIL GET POLLUTED BY CHEMICAL THE SOIL LOSSES IT
FERTILITY

4. INCREASE FOOD PRODUCTION
•As worldpopulationisincreasethequantityoffoodisneedto
increaseproductionoffood
•In agriculturalmachineryhasmadea verybigdifferentsuch
as 1,TRACTORS
• 2,COMBINEHARVESTERS

5. NEGATIVE IMPACTS OF
MONOCULTURES
$, CROPSPLANTSAREUSUALLYGROWNASLARGEAREAOF A
SINGLEVARIETYTHISIS CALLEDMONOCULTURE
$, INA NATURALECOSYSTEMTHEREAREUSUALLYMANY
DIFFERENTSPECIESOF PLANTSGROWINGWHICHIN TURN
SUPPORTMANYDIFFERENTSPECIESOFPLANTS.

6. Habitat Destruction
The very rapid increase in the size of the human population has already to led need
to increase
food production
Larger population require a greater supply of commodities
Resources extracted from the soil the result of that extraction is a depleted and
greatly changed natural landscape

7. THE UNDESIRABLE EFFECTS OF
DEFORESTATION
$, When extensive areas are cleared of forest so that the land can be used for
agriculture(the process Is called Deforestation )
$, The loss of trees exposes the soil to wind and rain allowing the soil to be lost as it is
washed into river.

8. EFFECT OF LOSS OF SOIL
THE LOSS OF HUMANS IN THE SOIL; LEAVES FROM THE TREES FALL
TO GROUND CAUSE DEFORESTATION

9. POLLUTION
@, Humans are responsible for contaminating the environment with discard
waste and unwanted, toxic (poisonous ) chemical
* Other forms of water pollution
@, Harm on a larger scale is caused by releasing untreated sewage and
fertilisers into river
@, Sewage contains pathogenic organisms if the water is used for human
consumption then diseases such cholera spared
@, The water in the river get polluted the fish die in a large scale

10. THE EFFECT OF NON BIODEGRADABLE
PLASTICS IN THE ENVIRONMENT
#,MOSTPLASTICSHAVEA HIGHRESISTANCETOTHEBACTERIATHATCAUSEDECAYTHUS
WHENDISCARDEDTHEYTAKEMANYYEARSTODECOMPOSEWESEETHISFROMTHEPLASTIC
BAGSBOTTLESTHATDISFIGURETHEABILITYOF SOILTODECOMPOSE.

11. AIR POLLUTION
THIS IS CAUSED BY THE RELEASE INTO THE AIR OF GASES IN
LARGER QUANTITIES

12. POLLUTION IN AIR SUCH AS ACID RAIN
#,Sulfur dioxide is a gas that is releasedwhenever fossil fuels
are burnt
#,In industrial areas the amount of sulfur dioxide released into
the air can be high it has a harmful effect as a gas since it is
linkedwith bronchitis andheart disease

13. CONSERVATION
Sustainableresourcesis as one whichis producedas rapidlyas itis removedfromthe
environmentsothatIt doesnotrunout

14. RECYCLING OF RESOURCES
@, Pressure is taken off endangeredspecies if countries encourage
a policy of recycling many cars anddrinks can are now made of
recycledmetal bottles are fromrecycledglass
@, Paper also recycle reducing the number of trees that needto be
cut down
@, Litter is also reducedby recycling making our environment a
more pleasant place in which we live

15. THANK Q
DONE BY ;- MOHAMMED ADNAN
IX- IGCSE