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GLOBAL WARMING
IMPACT ON HEALTH
-: Dr. Gulrukh Hashmi
“In nature there are neither rewards
nor punishments; there are only
consequences”
—Robert Green Ingersoll
Overview
 Defination
 Greenhouse effect
 Impact on health
 Heat stress
 Respiratory illnesses
 Vector borne diseases
 Water borne diseases
 Disasters
 Mental health
 Recommendations
GLOBAL WARMING
•Global warming is the increase in the average
measured temperature of the Earth.
• It is mainly caused by “Greenhouse Effect”.
Global warming impact on health
Global warming
Nitrous oxide
from exhausts
of cars,
disposal of
waste and
fertilizer use.
methane released
from paddy field,
marshes, animal
husbandry and
landfills
Carbon dioxide
from burning
fossil fuels,
power stations,
deforestation
• Without greenhouse gases the temperature of earth
would average around 33º C.
• Due to increased greenhouse gases in atmosphere
there has been 0.8 ºC rise in global temperature.
• Within next 100 years the temperature could rise upto
5 ºC.
Impact of global warming on health
Changes due to global warming Impact on Human Health
•Warmer Temperatures and stagnant air
masses
•Increased risk of heat strokes ,heat
exhaustion
• Changes in vector borne transmitted
diseases
•Heavy precipitation events
• Floods
•Water pollution
•Intense weather events (Cyclones,
Storms)
•Loss of Life, injuries, life long handicaps.
•Diseases outbreak.
• overcrowding, poor sanitation.
• Air pollution Respiratory illnesses
• Ozone depletion •Increased skin cancers and cataracts
• Globally there are 150,000 deaths and 5million deaths
attributed to global warming.
• Global loss of 5.5 million Disability Adjusted life
Years (DALYs).
• South East Asian countries contributing to loss of 2.5
million DALYs.
• In India, about 27% DALYs lost and about 30%
deaths.
Global warming impact on health
•Heat waves
•Air pollution
•Ozone
depletion
• Heat stroke
•Heat exhaustion
•Respiratory diseases
•Cardio-vascular illness
•Skin cancers
•Cataracts
HEAT STRESS
• Episodes of extreme heat have been associated with
increased mortality.
• Frequency of hot days and multiple-day heatwaves
has increased in past century
• Extreme heatwaves causes more harm to elderly
people and young children.
• City dwellers are most affected due to “urban heat
island effect” .
•For every 1ºC increase above 29ºC there was 3.94%
increase in mortality.
• 14,800 deaths in France due to heatwaves in August 2003.
• 18 heatwaves were reported in India between 1980 & 1998
causing 1300 deaths.
• The year 2010 was recorded as hottest year in india with
temperature reaching 50 ºC
Year Number of deaths
1998 2000
1999 91
2000 29
2003 3000
2012 200
Death toll due to heat waves in India
RESPIRATORY ILLNESSES
• Increase in temperature speeds the process of smog
formation.
• Rising carbon dioxide causes plants to produce more
pollens.
• Exposure causes
 Increased irritation of eyes, throats and lungs.
 Triggers asthma attacks
Premature deaths from ground-level ozone
EXPOSURE TO UV RAYS
• Excessive solar UVR exposure has caused the loss of
approximately 1.5 million disability-adjusted life
years (DALYs) (0.1% of the total global burden of
disease) and 60,000 premature deaths in the year
2000.
• The greatest burden is by UV induced
 cortical cataracts,
 cutaneous malignant melanoma
 sunburn
OCCUPATIONAL HEALTH
• Global warming causing heat stress affects both
indoor and outdoor worker.
• Working in hot environments causes
 diminished ability to carry out physical tasks,
 diminishes mental task ability,
 Increases accident risk
 Leads to heat exhaustion or heatstroke
•Warmer temp
• Disturbed rainfall
patterns
•Increased
precipitation
Vector borne
diseases
VECTOR BORNE DISEASES
• The distribution of vector-borne infectious diseases
such as malaria is influenced by the spread of vectors
and the climate dependence of the infectious
pathogens.
• The insect-borne infectious diseases strongly
modulated by global warming include
 malaria,
 dengue fever
 schistosomiasis
• Climate change is likely to expand the geographical
distribution of several vector-borne diseases,
including malaria, dengue and leishmaniasis to higher
altitudes
• India has about 2 million confirmed cases of malaria
per year while 15000 die from it per year
• 65% cases are reported from Orissa, Jharkand,
Madhya Pradesh, Chattisgarh, West Bengal and
Northeast
• Globally greater than 200-400 million
population will be at risk by 2020.
• In India there will be
shift to south western and northern states
transmission will increase in western states
 new foci will be in Himalayan regions
Increased intensity in northeastern states.
•Heavy rainfall
•Droughts
•Cyclones,tornadoes
• Water borne diseases:
Cholera, diarrhea,
• Malnutrition
•Human displacement
leading to
overcrowding, poor
sanitation
WATERBORNE DISEASES
• Water borne diseases can occur both in droughts and
due to floods.
• Poor sanitation and hygiene can also contribute to the
disease.
• Vibrio species also proliferate. in warm marine
waters
• For every 1ºC rise in temperature cases of diarrhea
increased by 8%
WATER BORNE DISEASES
• Diarrheal diseases alone causes more than 2 million
deaths globally.
• Accounts for 4.8% of DALYs of total global burden
of diseases.
• In India, the figures for estimated disability adjusted
life years (DALY) lost were 23,801,447 in 2006 and
by 2016, 21,486,636 DALYs are projected .
NATURAL DISASTERS
• Major storm and flood disasters have occurred in the
last two decades.
• In terms of deaths and populations affected, floods
and tropical cyclones have the greatest impact in
South Asia and Latin America.
• Flood health impacts range from deaths, injuries,
infectious diseases and toxic contamination, to mental
health problems
• Serious and recurrent floods in Bangladesh, Nepal
and north-east states of India during 2002, 2003
and 2004
• A record 944 mm of rainfall in Mumbai, India on
26 to 27 July 2005 led to loss of over 1,000 lives
with loss of more than US$250 million
• Floods in Surat, Barmer and in Srinagar during
summer monsoon season of 2006.
• The effects of drought on
health include
 decreased food crop
production and water
availability
 malnutrition (undernutrition,
protein-energy malnutrition
and/or micronutrient
deficiencies)
 infectious diseases
• Population displacement can lead to
overcrowding
a lack of safe water, food and shelter
Increased levels of stress causing increase in
psychiatric illnesses.
Mental health
• Increases in malnutrition and consequent disorders, with
implications for child growth and development;
• Increased deaths, disease and injury due to heatwaves, floods,
storms, fires and droughts;
• Increased burden of diarrhoeal disease;
• Mixed effects on the range and transmission potential of malaria;
• Increased frequency of cardio-respiratory diseases due to higher
concentrations of ground-level ozone related to climate change;
• Altered spatial distribution of some infectious-disease vectors.
(IPCC Fifth Assessment report)
Recommendations
• Environmental monitoring and surveillance
• Geospatial technology
• Human and technical capacity
Conclusion
• The risk of global warming is substantial
• There should be more studies to assess the linkages
between global warming and specific health
outcomes especially in India.
• There is need to develop integrated survellience
system to identify vulnerable regions.
• Effective education measures to spread awareness
regarding global warming.
References
• IPCC, 2007: climate change 2007: impacts, adaptation and
vulnerability,contribution of working group II to the fourth
assesssment report of the intergovernmental panel on climate
change,cambridge university press,cambridge,uk.
• WHO: climate change and human health - risk and responses
• Kathleen F. Bush, Impacts of climate change on public Health
in India: Future Research Directions.
• Nitesh Dogra, Sangeet Srivastava : Climate Change and
Diseases Dynamics In India, executive summary, Energy and
Resources Institute.
• Indur M. Goklany. Global Health Threats: Global Warming in
Perspective. Journal of American Physicians and Surgeons.
14(3);2009;69-75
References
• Patz and Olson. Climate change and health: global to local
influences on diseases risk. Annals of Tropical Medicine and
Parasitology;100(5-6),535-549 (2006).
• Andrew K. Githeko. Climate change and vector-borne
diseases:a regional analysis.Special Theme – Environment and
Health. Bulletin of the World Health Organization, 2000,
78(9)
Thank you

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Global warming impact on health

  • 1. GLOBAL WARMING IMPACT ON HEALTH -: Dr. Gulrukh Hashmi
  • 2. “In nature there are neither rewards nor punishments; there are only consequences” —Robert Green Ingersoll
  • 3. Overview  Defination  Greenhouse effect  Impact on health  Heat stress  Respiratory illnesses  Vector borne diseases  Water borne diseases  Disasters  Mental health  Recommendations
  • 4. GLOBAL WARMING •Global warming is the increase in the average measured temperature of the Earth. • It is mainly caused by “Greenhouse Effect”.
  • 6. Global warming Nitrous oxide from exhausts of cars, disposal of waste and fertilizer use. methane released from paddy field, marshes, animal husbandry and landfills Carbon dioxide from burning fossil fuels, power stations, deforestation
  • 7. • Without greenhouse gases the temperature of earth would average around 33º C. • Due to increased greenhouse gases in atmosphere there has been 0.8 ºC rise in global temperature. • Within next 100 years the temperature could rise upto 5 ºC.
  • 8. Impact of global warming on health Changes due to global warming Impact on Human Health •Warmer Temperatures and stagnant air masses •Increased risk of heat strokes ,heat exhaustion • Changes in vector borne transmitted diseases •Heavy precipitation events • Floods •Water pollution •Intense weather events (Cyclones, Storms) •Loss of Life, injuries, life long handicaps. •Diseases outbreak. • overcrowding, poor sanitation. • Air pollution Respiratory illnesses • Ozone depletion •Increased skin cancers and cataracts
  • 9. • Globally there are 150,000 deaths and 5million deaths attributed to global warming. • Global loss of 5.5 million Disability Adjusted life Years (DALYs). • South East Asian countries contributing to loss of 2.5 million DALYs. • In India, about 27% DALYs lost and about 30% deaths.
  • 11. •Heat waves •Air pollution •Ozone depletion • Heat stroke •Heat exhaustion •Respiratory diseases •Cardio-vascular illness •Skin cancers •Cataracts
  • 12. HEAT STRESS • Episodes of extreme heat have been associated with increased mortality. • Frequency of hot days and multiple-day heatwaves has increased in past century • Extreme heatwaves causes more harm to elderly people and young children. • City dwellers are most affected due to “urban heat island effect” .
  • 13. •For every 1ºC increase above 29ºC there was 3.94% increase in mortality. • 14,800 deaths in France due to heatwaves in August 2003. • 18 heatwaves were reported in India between 1980 & 1998 causing 1300 deaths. • The year 2010 was recorded as hottest year in india with temperature reaching 50 ºC
  • 14. Year Number of deaths 1998 2000 1999 91 2000 29 2003 3000 2012 200 Death toll due to heat waves in India
  • 15. RESPIRATORY ILLNESSES • Increase in temperature speeds the process of smog formation. • Rising carbon dioxide causes plants to produce more pollens. • Exposure causes  Increased irritation of eyes, throats and lungs.  Triggers asthma attacks
  • 16. Premature deaths from ground-level ozone
  • 17. EXPOSURE TO UV RAYS • Excessive solar UVR exposure has caused the loss of approximately 1.5 million disability-adjusted life years (DALYs) (0.1% of the total global burden of disease) and 60,000 premature deaths in the year 2000. • The greatest burden is by UV induced  cortical cataracts,  cutaneous malignant melanoma  sunburn
  • 18. OCCUPATIONAL HEALTH • Global warming causing heat stress affects both indoor and outdoor worker. • Working in hot environments causes  diminished ability to carry out physical tasks,  diminishes mental task ability,  Increases accident risk  Leads to heat exhaustion or heatstroke
  • 19. •Warmer temp • Disturbed rainfall patterns •Increased precipitation Vector borne diseases
  • 20. VECTOR BORNE DISEASES • The distribution of vector-borne infectious diseases such as malaria is influenced by the spread of vectors and the climate dependence of the infectious pathogens. • The insect-borne infectious diseases strongly modulated by global warming include  malaria,  dengue fever  schistosomiasis
  • 21. • Climate change is likely to expand the geographical distribution of several vector-borne diseases, including malaria, dengue and leishmaniasis to higher altitudes • India has about 2 million confirmed cases of malaria per year while 15000 die from it per year • 65% cases are reported from Orissa, Jharkand, Madhya Pradesh, Chattisgarh, West Bengal and Northeast
  • 22. • Globally greater than 200-400 million population will be at risk by 2020. • In India there will be shift to south western and northern states transmission will increase in western states  new foci will be in Himalayan regions Increased intensity in northeastern states.
  • 23. •Heavy rainfall •Droughts •Cyclones,tornadoes • Water borne diseases: Cholera, diarrhea, • Malnutrition •Human displacement leading to overcrowding, poor sanitation
  • 24. WATERBORNE DISEASES • Water borne diseases can occur both in droughts and due to floods. • Poor sanitation and hygiene can also contribute to the disease. • Vibrio species also proliferate. in warm marine waters • For every 1ºC rise in temperature cases of diarrhea increased by 8%
  • 25. WATER BORNE DISEASES • Diarrheal diseases alone causes more than 2 million deaths globally. • Accounts for 4.8% of DALYs of total global burden of diseases. • In India, the figures for estimated disability adjusted life years (DALY) lost were 23,801,447 in 2006 and by 2016, 21,486,636 DALYs are projected .
  • 26. NATURAL DISASTERS • Major storm and flood disasters have occurred in the last two decades. • In terms of deaths and populations affected, floods and tropical cyclones have the greatest impact in South Asia and Latin America. • Flood health impacts range from deaths, injuries, infectious diseases and toxic contamination, to mental health problems
  • 27. • Serious and recurrent floods in Bangladesh, Nepal and north-east states of India during 2002, 2003 and 2004 • A record 944 mm of rainfall in Mumbai, India on 26 to 27 July 2005 led to loss of over 1,000 lives with loss of more than US$250 million • Floods in Surat, Barmer and in Srinagar during summer monsoon season of 2006.
  • 28. • The effects of drought on health include  decreased food crop production and water availability  malnutrition (undernutrition, protein-energy malnutrition and/or micronutrient deficiencies)  infectious diseases
  • 29. • Population displacement can lead to overcrowding a lack of safe water, food and shelter Increased levels of stress causing increase in psychiatric illnesses.
  • 31. • Increases in malnutrition and consequent disorders, with implications for child growth and development; • Increased deaths, disease and injury due to heatwaves, floods, storms, fires and droughts; • Increased burden of diarrhoeal disease; • Mixed effects on the range and transmission potential of malaria; • Increased frequency of cardio-respiratory diseases due to higher concentrations of ground-level ozone related to climate change; • Altered spatial distribution of some infectious-disease vectors. (IPCC Fifth Assessment report)
  • 32. Recommendations • Environmental monitoring and surveillance • Geospatial technology • Human and technical capacity
  • 33. Conclusion • The risk of global warming is substantial • There should be more studies to assess the linkages between global warming and specific health outcomes especially in India. • There is need to develop integrated survellience system to identify vulnerable regions. • Effective education measures to spread awareness regarding global warming.
  • 34. References • IPCC, 2007: climate change 2007: impacts, adaptation and vulnerability,contribution of working group II to the fourth assesssment report of the intergovernmental panel on climate change,cambridge university press,cambridge,uk. • WHO: climate change and human health - risk and responses • Kathleen F. Bush, Impacts of climate change on public Health in India: Future Research Directions. • Nitesh Dogra, Sangeet Srivastava : Climate Change and Diseases Dynamics In India, executive summary, Energy and Resources Institute. • Indur M. Goklany. Global Health Threats: Global Warming in Perspective. Journal of American Physicians and Surgeons. 14(3);2009;69-75
  • 35. References • Patz and Olson. Climate change and health: global to local influences on diseases risk. Annals of Tropical Medicine and Parasitology;100(5-6),535-549 (2006). • Andrew K. Githeko. Climate change and vector-borne diseases:a regional analysis.Special Theme – Environment and Health. Bulletin of the World Health Organization, 2000, 78(9)