A complete review of Nature of Environmental Hazards.

1. Nature of Environmental Hazards:
Hazards and risk, biological
hazards, chemical hazards, physical
hazards, and mechanical hazards
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4. Hazard
A hazard is an agent
which has the potential to
cause harm to a
vulnerable target.
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5. Risk
Risk is a potential of
gaining or losing
something of value. Value
such as (physical health,
social status and financial
health)
Risk has direct relation
with uncertainty.
Risk is a probability(
chance of happening
something).
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6. Environmental Hazard
A substance state or event which has potential to threaten the
surrounding natural environment and adversely effect on human health,
including pollution and natural disasters.
They are categorized as:
 Chemical Hazard
 Physical Hazard
 Biological Hazard
 Mechanical Hazard
 Psychosocial Hazard
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8. Physical Hazard
Physical hazard are substance and activities that threaten your physical
safety. They are the most common and present at most work places.
They include unsafe conditions, that can cause injury illness or death.
Following are the physical Hazards:
 Temperature
 Indoor air quality
 Radiations
 Noise
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10. Chemical Hazard
Hazardous chemical in the work place are substance, mixture and
material, that can be classified according to their physicochemical risks
and danger.
Chemical Hazards include:
 Air born
 Hazardous chemical
 Major Hazard
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12. Biological Hazard
Biological agents are
living things or product
of living things that cause
illness and diseases.
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13. Biological
agents
Virus Bacteria Fungi
Biological Hazard
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14. Biological Hazard
Examples
• Bacteria cause Tuberculosis
• Fungi cause Aspergillosis
• Virus cause Hepatitis
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15. Biological Hazard
• Some infectious agents are transmitted directly by a physical contact
with infected person.
• Some agents are transmitted indirectly with food, water and inhalation.
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17. Mechanical Hazard
Mechanical Hazard are created as a result of either powered or manual
use of tools, equipment's and machinery.
Examples
 Stabbing and puncture by nail gun
 Cutting due to motion cutter
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19. Conclusion
Hazard has potential to cause damage. Different hazards have different
impacts. Some can be chemical and some can be biological agents.
 Some hazards cause physical injuries
 Some hazards cause acute and chronic diseases.
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20. References
• www.landfooline.com/oi/tenh20
• www.pollutionpollution.com/terms/r/risk.asp
• www.ccohs.ca/tpoics/hazards
• www.comcave.gov.an
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