Natural resources, Conservation, & its Depletion.
a slide with simple understanding sentences on Natural Resources, conservation and its depletion.
Published on: Mar 3, 2016
Transcripts - Natural resources, Conservation, & its Depletion.
& DEPLETION OF
JONATHAN VINCENT, MBA(S-2),
Any thing, which is useful man, or can be
transformed into a useful product or can be
used to produce a useful thing, can be
referred as ‘resources’.
Example: rocks, minerals, soil, rivers,
plants & animal.
Materials that come from the Earth.
Something useful for humans need to survive.
Those resources that are drawn directly from the
nature and used without modifications are called
E.g.: air, water, minerals etc.
TYPES OF NATURAL RESOURCES
On the basis of origin:
On the basis renewability
ON THE BASIS OF ORIGIN:
Abiotic natural resources are all the non-living resources
that cannot replace themselves easily and are obtained
from the surface of the earth’s crust.
Some of these resources are reproduced at extremely
slow rates in terms of human life periods.
Examples would include water, land, mineral ores such as
copper, gold, silver and aluminium.
Biotic natural resources are all living resources
that are able to reproduce, replace life and
grow in numbers.
These are all the resources that are obtainable
from the biosphere.
Example agriculture, fish, wildlife etc.
ON THE BASIS RENEWABILITY:
There are some resources that cannot be exhausted and are
available in plentiful.
These can be easily replenished through natural processes in
different ecosystems and are often known as renewable natural
For example, sunlight and wind are two examples of renewable
These are those resources which are not
renewed/replenished and are affected by
Non renewable resources are exhaustible and
are extracted faster than the rate at which they
formed. For e.g. fossil fuels.
It is a natural resource that will never run out so if
we take advantage of the greatest natural
resources will not be depleted and will continue
to exist, such as water, sunlight, tidal energy,
ocean energy and wind energy.
Wind power technology is one of inexhaustible
These resources are limited in nature
and they are non-maintainable.
Comes under non-renewable category.
Example: coal, petrol.
CONSERVATION OF NATURAL
Conservation of Water
Conservation of Soil
Conservation of Energy
Conservation of Water
Conservation of water are essential for the survival of mankind,
plants and animals. This can be achieved by adopting the
Constructing dams and reservoirs to regulate supply of water
to the fields, as well as to enable generating hydroelectricity.
Sewage should be treated and only the clear water should be
released into the rivers.
Industrial wastes (effluents) should be treated to prevent
chemical and thermal pollution of fresh water.
Judicious use of water in our day-to-day life.
Rainwater harvesting should be done by storing rainwater and
Conservation of Soil
Soil conservation means checking soil erosion and improving soil fertility
by adopting various methods. Let us know some of these methods.
Maintenance of soil fertility: The fertility can be maintained by adding
manure and fertilizers regularly as well as by rotation of crop.
Make compost from your kitchen waste and use it for your kitchen-
Reforestation: Planting of trees and vegetation reduces soil erosion by
both water and wind.
Do not irrigate the plants using a strong flow of water as it would wash
off the soil.
Better use sprinkling irrigation.
Conservation of Energy
We should not keep lights unnecessarily switched on.
Reduce the energy your appliances consume by analysing star ratings.
Use solar cooker for cooking, which will make the food more nutritious and will
save your LPG expenses..
At Public Places :
Switch off the fans and lights in the places like bus terminal and railway stations
when not necessary.
Drive less, make fewer trips and use public transportations whenever possible.
Big Hoardings, lightened up for the whole evening and nights are other wastage
of power which can be and should be avoided.
DEPLETION OF NATURAL
Resource depletion is the consumption of a resource faster than
it can be replenished.
Over a period of time, many of our natural resources are being
depleted. Many activities of human society are responsible for
this degradation of the environment.
Agricultural practises such as indiscriminate use of fertilizers and
pesticides contaminate the soil.
Urbanisation, overpopulation, increase in use of carbon
monoxide producing automobiles, deforestation, deterioration
of water resources are all factors contributing to this depletion.
Depletion of natural resources refers to the exhaustion of raw
materials within a region. Our resources are getting depleted at
a faster rate than they are produced or renewed by nature.
Types of Degradation
DEFORESTATION : Deforestation is the clearance of forests by logging and/or
DESERTIFICATION: Desertification is a type of land degradation in which a
Relatively dry land region becomes increasingly arid, typically losing its bodies
of water as well as vegetation and wildlife.
EMISSION: When human or natural forces release chemicals or other
substances into the environment, the process is known as emission. Many
natural processes cause emissions. When a volcano erupts, it lets out acid,
and acid, ash, and many toxic gases.
EROSION: Erosion is the action of exogenic processes (such as water flow or
wind) which remove soil and rock from one location on the Earth's crust, then
transport it to another location where it is deposited.
KINDS OF RESOURCES
Forest is an area with a high density of trees,
together with other plants, covering a large area
Forests are home to 50% to 90% of earth’s species.
These forests not only produce innumerable
material goods, but also provide several
environmental services which are essential for life.
Functions of Forest Resources
•Timber, bamboos, food, essential oils
•Latex, medicines etc.Productive
•Conversation of soil and water
•Prevention of drought
•Protection against wind, cold, radiation,
•Absorption, storage and release of gases,
water, mineral elements & radiant energy.Regulative
Causes of Deforestation
projects Forest fires
Effects of Deforestation
Water resources are sources of water that are useful
or potentially useful to humans. Uses of water
include agricultural, industrial, household,
recreational and environmental activities. Virtually
all of these human uses require fresh water.
Water is an essential natural resource for sustaining
Water forms 60% of our body weight.
Water is a renewable and limiting resource.
About three – fourth of earth’s surface is occupied by
About 97% of the earth’s water is strong saline.
The rest 3% is freshwater.
Pure, usable water on land is only 0.3%.
About 70% of the total consumption is used in
About 1.1% is used for domestic and municipal
Rest is used by various industries.
FRESH WATER SOURCES
Surface Water Under river flow
Ground Water Frozen Water
FRESH WATER USERS
House hold Recreation
It is caused by over exploitation, excessive use and
unequal access to water among different social
Increasing population, intensive industrialization,
deforestation and mismanagement of water resources
have caused a crisis
Minerals are naturally occurring, inorganic, crystalline solids having
a definite chemical composition and characteristic physical
Minerals are exhaustible and non-renewable.
Minerals are relatively plentiful.
Minerals are over used by industries.
Disposal of minerals have negative effects on environment.
Metallic minerals – e.g., iron, copper, silver, gold
Non-metallic minerals – e.g., sand, stone, salt, phosphates
USES OF MINERALS
The main uses of minerals are as follows:
Development of industrial plants and machinery.
Generation of energy e.g. coal, lignite, uranium.
Construction, housing, settlements.
Defence equipment weapons, armaments.
Communication- telephone wires, cables, electronic
Medicinal system- particularly in Ayurveda System.
Agriculture – as fertilizers, seed dressings and fungicides
(e.g. Zineb: containing zinc, Maneb: containing manganese
Jewellery– e.g. Gold, silver, platinum, diamond.
CONSERVATION OF MINERALS
Recycling – Minerals in products can be recycled.
Reuse – reuse the beneficial items e.g. glass
Substitution – Scarce minerals can be substituted
with more abundant minerals. e.g. ceramics,
Reduce consumption – Consumers must decrease
their mineral consumption.
Recycle industrial wastes – One industry may use
the waste products of another industry.
The substances from which we produce energy are known
as energy sources. We need energy for our day to day life.
The energy we use are of two broad categories:
1. Renewable source of energy
2. Non-renewable source of energy
The sources of energy that once used , cannot be reused are known as
non-renewable sources of energy. These are the energy sources which are
mined from the earth crust. These sources of energy are known as fossil
fuels and these took millions of years to form and cannot be regenerated in
a matter of years. The rate of consumption far exceeds the rate of
production of these resources
* Natural gas
* Nuclear fuel
The virtually unlimited sources of energy which will not be exhausted in any
near future are known as the renewable sources of energy. These energy
sources are continuously replenished at a constant rate. About 16.7% of
global final energy consumption comes from renewable energy sources.
The renewable sources of energy include:
In the direct words
‘Natural resource in the form of arable land.’
Arable land (from Latin arabilis, "able to be plowed") is land
capable of being ploughed and used to grow crops.
Land is among the most important natural resources. It covers
up only 29% of the earth’s surface and all parts of the land are
not habitable. The uneven distribution of population in different
parts of the world is mainly due to varied characteristics of land
The change in the characteristic and quality of soil which adversely affect its
fertility is called as Degradation.
Land degradation is the most important environmental problem currently
challenging sustainable development in many parts of the world.
Land degradation means:
1) Loss of natural fertility of soil because of loss of nutrients.
2) Less vegetation cover
3) Changes in the characteristic of soil.
4) Pollution of water resources from the contamination of soil through which
water sweeps into ground or runoff to the water bodies.
5) Changes in climatic conditions because of unbalance created in the
Causes of land degradation
Soil erosion by wind or water
Unsustainable agricultural practices
Soil erosion is the washing or blowing away of the top
layer of the soil.
It washes away the nutrients in soil such as nitrogen,
phosphate and potassium are lost resulting in
infertility of the soil.
In India in 1971 alone 6000 million tons of soil was lost.
CAUSES OF SOIL EROSION
RAINFALL- raindrops directly strike the soil surface and
detach the soil particles.
WIND- transportation of soil and sand particle by wind
by wind is best seen in deserts and along the
BIOTIC FACTORS- grazing by cattle, cutting down of
trees, agricultural activities, construction of buildings
and laying of roads.
Desertification is a process by which fertile land
becomes desert. Causes for the origin of
Removal of trees .
Modern methods of agriculture instead of more
Over exploitation of fertile soil particularly in
areas of low rainfall by cultivating cash crops.