Environmental Pollution and prevention
Pollution is the introduction of contaminants into the natural environment that cause adverse change. Pollution can take the form of chemical substances or energy, such as noise, heat or light. Pollutants, the components of pollution, can be either foreign substances/energies or naturally occurring contaminants.
Published on: Mar 4, 2016
Transcripts - Environmental Pollution and prevention
Made by: Deepanshu Kapoor
Project Guide: Dr. Tanuja Nautiyal
Man is one of the species who inhabit the earth .
he is the only one who has interfered with various natural
processes for use of both biological & physical resources
to meet his multiple demands, man has polluted all the –
lithosphere , hydrosphere & atmosphere. it is essential
for us e realms of to know about environment & its
•Primary & secondary pollutants
•Green house effect
That which surrounds, the total sum of the
condition of the surroundings within which an
organism, or group, or an object,exists(including
the natural as modified by human activity & the
Our current atmosphere is a
mixture of many different gases
& suspended particles. It is
almost same every where up to
an altitude of 80 Kms.The
atmosphere is divided in to 4
Troposphere 0-8 15 to 45 N2,O2,CO2,
Stratosphere 8-50 -55 to 05 O3,O2
Mesosphere 50-80 -2 to -90 N2+O2
Is an unwanted change in the
quality of earth's earths
atmosphere caused by
emission of gases caused by
emission of gases due to
burning of fossil
Industries waste Other
1. Gaseous waste: Oxides of
nitrogen,SO2,CO2,CO.Cl,Br,I,O3 & smog.
2. Complex organic chemicals: Benzene, ether.
3. Acid prop lets: H2SO4, HNO3
4. Agrochemicals: fertilizers,
6. Metals: Mercury,lead,Cd,Zn,Fe,Ni etc.
7. Solid wasre:Garbage,plastic etc.
8. Radioactive waste: Nuclear
9. Noise waste
Secondary pollutants :These result from chemical reactions
between two or more air components.
Formation of secondary pollutants
2SO3+H2O H2SO4 (Secondary pollutant)
Primary Pollutants: Harmful chemical that directly enters the
air as a result of human activity. These are deforestisation
burning of fossil fuel industrialization warfare etc.
Primary Pollutants Secondary Pollutants
Green house effect: Increasing global
temperature. Scientists predicting that
earth's temperature will increase by 3-40
year 2030 if the pollution continues to
increase at the same pace.
Ozone depletion: As ozone layer in the upper
atmosphere absorbs incoming harmful
ultraviolet radiation but it is now getting
thinner & more UVs are reaching in to earth
creating different disease like cancer& eye
Photochemical smog: In 1952 London was
covered by smog for 10 days .This smog was
caused by fog, smoke, ash,& SO2 plus
NO2.Sunlight played a great role in the
formation of this smog .Though deaths
occurring at that time were not directly
attributed to the smog later statistics
confirmed that 6,000 more people.
Acid rain: is caused by oxides of nitrogen &
sulphur.It increases acidity of soil & effects
the growth of trees & plants. The majestic
monument Taj Mahal in India is also affecting
H2SO4 (Sulphuric Acid)
HNO3 (Nitric Acid)
Nitrous oxide 06%
Green house gases in natural
condition insulates the earth against
extreme of temperature by limiting
both incoming solar radiation &
escape of reradiated heat in to
This natural balance may be
distorted by Green House
Effect as gases such as
carbon dioxide have built up
in the atmosphere trapping
Contribution of different gases
to cause green house effect
The real greenhouse
The Ozone layer in
harmful UV rays
are entering in to
chlorine. The chlorine
than break down the
The chlorine released from CFCs break
down the ozone molecule.
More ultraviolet radiations are reaching in to earths
surface as there is a whole in ozone layer.
This era has rightly been called as the era of noise.because heavy
industrialization we are exposed to a high level of noise all around
us. Noise has become a very important stress factor in modern
life.it leads many health hazards.Some of the sources of noise
pollution are aircraft,automobiles,factories,loudspeakers& pop&
Rock-n-Roll music in clubs
. Noise produces following health problems-
2)Deafness or impaired vision
3)Rise in blood pressure, pulse
Jet take off
Very High above than
High Approximate 80db
Pleasant below than
Quit RainingSports car
Based on current water quality standards,
over 70 percent of our rivers, 68 percent
of our estuaries and 60 percent of our
lakes now meet legislatively mandated goals.
Some of the risks include
pollutant runoff from agricultural lands
stormwater flows from cities
About 40,000 times each year, sanitary
sewers overflow and release raw sewage to
streets and waterbodies.
Water Pollutionseepage into ground water from nonpoint sources
the loss of habitats such as wetlands.
we cannot always eat what we catch because fish
flesh is contaminated by the remaining discharges
and sources of toxic substances.
Microbial contamination of drinking water still
presents problems in many communities.
The Environmental Protection Agency found that 40% of theThe Environmental Protection Agency found that 40% of the
nation’s assessed waterways remain too polluted for fishing andnation’s assessed waterways remain too polluted for fishing and
swimming. Over 290,000 miles of 840,000 miles of assessedswimming. Over 290,000 miles of 840,000 miles of assessed
rivers and streams do not meet water quality standards. Nearlyrivers and streams do not meet water quality standards. Nearly
half of all lakes, reservoirs, and ponds assessed half of them arehalf of all lakes, reservoirs, and ponds assessed half of them are
If your habits are like other Americans,If your habits are like other Americans,
you generate about 4 pounds of solid trash per day.you generate about 4 pounds of solid trash per day.
Americans are generating waste products faster than natureAmericans are generating waste products faster than nature
can break them down and using up resources faster than theycan break them down and using up resources faster than they
can be replaced.can be replaced.
WHAT ARE WE GOING TO DO?
can wecan we
Water SolutionsWater Solutions
•Keep lakes cleanKeep lakes clean
•Take your used motor oil to a drop off placeTake your used motor oil to a drop off place
•Use latex paint instead of oil and rinse yourUse latex paint instead of oil and rinse your
in the sink rather than the yardin the sink rather than the yard
•Fill a spray bottle with soapy water insteadFill a spray bottle with soapy water instead
of bug sprayof bug spray
•Plant trees to prevent soil erosionPlant trees to prevent soil erosion
•Keep litter, pet waste, leaves, and grassKeep litter, pet waste, leaves, and grass
clippings outclippings out
of gutters and storm drains.of gutters and storm drains.
Air PollutionAir Pollution
Air PollutionAir Pollution
Encourage your family
to walk more
Take the school bus
Reduce the amount of
Do not burn leaves in
your yard- put them in
Keep your family cars
converters on cars
Share your room with
others when the air
conditioner is on
Take care of your trees
Solid WasteSolid Waste
Carry your own bag with you when you go
Say no to all plastic bags as often as
Reduce the use of paper bags also
Dig a compost pit in your garden and put all
the biodegradables in it
When you go out do not throw paper and
other wrappings or even leftover food here
and there-put it in the garbage.
We know that certain environmental conditions like air,water,& food
are essential for man,s survival.apart from their availability their
quality & quantity must be assured according to man,s natural &
acquired capacity for sustenance progress in industrialization has
brought environmental hazards such as air water & noise
pollution.These have caused many health problems & diseases.
As it has been said-
we do not inherit the environment from our
forefathers,we borrow it from future generation.
Stockholm conference of 1972 proclaims that:
The protection & improvement of human environment is a major
issue which affects the well being of people & economic development
throughout the world&it is duty of all governments & people to
common efforts for the preservation & improvement of environment
for the benefit of all people & their prosperity