Transcript Magnetism PowerPoint Template

HIGH VOLTAGE POWER LINES & PUBLIC HEALTH
Presented by
Sofia Habity
Global map
Process Flow
Support
Introduction
• OH-HV
• EMF
• ELF-EMF


Demonstrate
studies
Statistics
Conclusion
Test
Refutation
• Flawed studies
• graphs


Outcome
Island, ''land of
giants'' artistic
designs
INTRODUCTION


Over Head High Voltage (OH-HV)
OH-HV radiate Extremely low frequency electromagnetic
fields ( ELF-EMF)
- OH-HV EMF pulse 60 times/sec
➢ Illustrations
➢ Lamp plugged in (turned off).
➔ Voltage between the plug and the device.
➔ Electric field only.
➢ Lamp is turned on.
➔ Voltage produces a current flow; magnetic
field and electric fields
➔ Voltage oscillating at 50-60 Hz.
➔ Electric and magnetic fields oscillating at
50-60 Hz
50-60 Hz oscillations create ELF-EMF
...Illustrations

Fluorescent light
bulbs lighting up
No batteries
Not plugged in to
power sources
No connections
to the ground
EVIDENCE AGAINST HIGH
VOLTAGE POWER LINES
LONG TERM EFFECTS ( Under 345 kV, 500 kV)

Sperm count

Dynamic state of central nervous system

Heart, vessel system

Blood structure
SHORT TERM EFFECTS

Headaches

Abnormal fatigues

Sleepiness
Emphasis on subject within
0 - 100 m
1. Power line is a dominant
source of magnetic fields.
2. Risk of poor mental
health.
3. Biological effects
4. Childhood leukaemia.
Yamazaki Shin et al (2006). Association between High Voltage Overhead Transmission Lines and Mental
Health: A Cross-Sectional Study. Bioelectomagnetics
Extremely low frequency EMF field
Biological effect.
Exposure to intense fields
Exposure to Less intense fields
Magnetic phosphenes :
the stars and colours you
see when you run your
eyes
EMF and childhood leukaemia
Ahlbom, A. Et al. (2000). A pooled analysis of magnetic fields and childhood leukemia British journal of cancer, Vol 83(5), p 692-698,
REFUTATIONS




Small sample size ( 10
linemen)
Only 10 subjects lived
within 100 m
Low anticipation rate
23%
45% of women were
worried – only a mental
state
Yamazaki Shin et al (2006). Association between High Voltage Overhead Transmission Lines and Mental Health: A
Cross-Sectional Study. Bioelectromagnetics, Vol 27, p 473-478, 6p.
Emphasis on subject within
0 - 100 m
1. Power line is not always
a dominant source of
magnetic fields.
1. No biological effects
1. Childhood leukaemia.
Biological effect?
EMF and DNA

EMF possess insufficient energy to disrupt DNA covalent
bonds
CONCLUSION
• Theoretical & observational
confirmations for EMF to
influence human health.
• Acute health effects in long
term experiments
•
•
•
•
Limited evidence.
Possible biases
Flawed studies
No significant causal
relationship
Some high voltage lines are better than others
'The land of giants'
ISLAND
REFERENCES
Dr Niel Cherry ( April 2001). Evidence that Electromagnetic fields from high voltage power lines and in
buildings, are hazardous to human health, especially to young children. Environment
Management and Design Division, New Zealand. P 2-51, 49p.
Young Louise B., Young Peyton H. (Dec 1974). Pollution by Electrical Transmission. Bulletin of the
atomic scientists, Vol 30 (10), p 34-38, 5p.
Yamazaki Shin et al (2006). Association between High Voltage Overhead Transmission Lines and
Mental Health: A Cross-Sectional Study. Bioelectromagnetics, Vol 27, p 473-478, 6p.
Zenon Sienkiewicz (1998). Biological effects of electromagnetic fields and radiation. Journal of
radiological protection, Vol 18 (3), p 185-193.
Gerald Draper, John Swanson, Tim Vincent, Mary Kroll (2006). Power Frequency Electric and
Magnetic Fields in the light of Draper et al. 2005. Annals of the new york academy of sciences, Vol.
1076 (1), p 318-330, 13p.
Ahlbom, A. Et al. (2000). A pooled analysis of magnetic fields and childhood leukaemia. British
journal of cancer, Vol 83(5), p 692-698, 7p