Environmental factors like pollution, overpopulation, urbanization, and degradation of natural resources negatively impact human health. Air pollution causes respiratory issues, water pollution spreads diseases, and solid waste pollution contaminates land. Population growth exacerbates all environmental problems by leading to increased resource exploitation and degradation. Rapid urbanization stresses cities' ability to manage waste and provide healthcare. Loss of biodiversity from deforestation removes natural medicines and destabilizes life-supporting ecosystems. To protect human health and the environment, a sustainable development model is needed that considers nature's relationship to humanity.

1. ENVIRONMENT AND HUMAN
HEALTH
Sijo.A

2. ENVIRONMENT AND HUMAN HEALTH
• Environment and human health are intricately
related.
• A good environment is an indication of healthy
human beings and a developed nation.
• Now polluted atmosphere has become a serious
threat to the very existence of human species.
• Pollution growth and intensification of man’s
activities on various fronts like agricultural
development, urbanisation and industrialisation
all over the world have created a hazardous
environment.

3. • The environment is under constant
interference by human bound activities.
• The effect of environment on human health
are generally accounted in the following
terms-
1) The extent to which environmental
conditions lead to shortening of life.
2) The extent to which environment induced
disability or impairment is found, and
3) The extent to which the biological potential
of an individual is reduced.

4. ENVIRONMENTAL FACTORS
• The various environmental factors which
affect human health are-
1) Overpopulation
2) Pollution
3) Urbanisation
4) Degradation of natural resources

5. Over population
• Population explosion is the most important
cause of all environmental problems. It leads
to poverty, over exploitation of resources and
environmental degradation.

6. pollution
• Any change in the environment which directly
or indirectly affects the welfare of the human
beings is called pollution.
• But air pollution, water pollution and solid
waste pollution are of prime concern.
• Other kinds of pollution like nuclear hazards
also cause problems related to the health.

7. Air pollution
• Various pollutants
present in the air directly
affect the different
systems of the body
• These enter the human
body by inhalation or
absorption through skin
or eyes.

8. Water pollution
• About 70% of the water bodies
in the india are polluted.
Majority of indian rivers are
dangerously polluted.
• The common pollutants are the
industrial effluents, municipal
wastes, agro-chemicals, oil
spills etc.
• About 60% water borne
diseases are reported in india.
It includes typhoid, cholera,
bacillary and amoebic
dysentery, diarrhoea and
jaundice.

9. Solid wastes
• Discharge of industrial
sludges or dumping of
industrial and municipal
wastes is the prime
cause of land pollution.
• Such wastes includes
garbage, rubbish,
hospital refuse, dead
animals, agricultural
wastes etc.

10. Solid wastes
• Chemicals like pesticides,
weedicides, insecticides,
fungicides etc. used in
agriculture, food
preservation, community
health services etc.
• Most of the pesticides are
mutagenic and
carcinogenic.
• Mutagens can cause
chromosomal abberations
and various kinds of
hereditary abnormalities.

14. DDT can causes hepatocarcinoma, leukemia, aplastic anemia etc.

15. malathion
It causes schizophrenia and depression

16. Dieldrin
Dieldrin causes insomnia

17. Marathion
It causes muscular weakness and
delayed paralysis.

18. malathion
It damages liver and kidney etc.

19. Hospital refuses are the source of
various infectious diseases and
these act as ideal home for
disease carriers or vectors like
flies, insects, bugs, rodents etc.
Heavy metals contaminated
industrial effluents cause
toxicities and various health
problems such as fluorosis,
minamata disease etc.

20. urbanisation
• Increase in urbanisation adversely affects the
ecological balance. It not only causes
deforestation but also increases uncontrolled
discharge of municipal wastes.
• Most indian cities have about 40% population
which leads to deteriorating life quality and
poor health services and flourishing of
communicable diseases.
• These area lack basic amenities and are
disease prone. As such the down troden areas
of the cities are the prime source of infectious
diseases.

21. Degradation of natural
resources
 Loss of natural resources adversly affects the
quality of human life, e.g. deforestation
results in biodiversity loss because
biodiversity is essential for maintaining the
basic life supporting process.
 A number of medicines procured from
various life forms are essential for human
health.

22. THE CONCLUSION
 As such clean and green environment is the
life of life. A time to take corrective steps is
still there, if taken care of. Now a new
concept of development is needed that
emphasises the relation between human
beings and nature.
 A sustainable development is the only
solution to save human life and health.

23. Thank you……..
Thank
you….