Question

what is a hazard? How natural hazard becomes a disaster ?what are the several types of hazard

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Answer 1

Answer:

A natural disaster is a test or significant damage caused by a natural event inclosed risk (hazardous).

Types of hazards:

volcanic eruption, earthquakes, hurricanes and other natural phenomena that cause significant damage to property and human beings.

Answer 2

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here is your answer...

*What is a hazard?

A hazard is an agent which has the potential to cause harm to a vulnerable target. The terms "hazard" and "risk" are often used interchangeably. However, in terms of risk assessment, they are two very distinct terms. A hazard is any agent that can cause harm or damage to humans, property, or the environment.

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*How natural hazard becomes a disaster ?

A hazard can also be an occurrence in which there is danger without there being loss or damage in human, economic or environmental terms. A tsunami that hits an uninhabited island, for example, will fit this definition.  

A disaster, conversely, is described as a sudden event which causes major and critical damage that leads to extensive losses in human, economic, and environmental terms. A disaster leads to the complete disruption of a community to such an extent that it cannot bear the repercussions on its own. A disaster, therefore, can result in the loss of many lives or completely destroy a habitat to such an extent that it is either permanently irrecoverable or would take an extended period and huge resources to repair. The Chernobyl disaster, for example, resulted in the deaths of many as a result of radiation poisoning and practically destroyed an entire habitat.  

In both hazards and disasters, the risk and damage may either be natural or the result of human activity or intervention.

A hazard, then, only presents the possibility of damage and only becomes a disaster once the threat becomes a reality.

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*what are the several types of hazard ?

There are two basic categories of hazard:

Acute hazard: Acute hazards are those that have an obvious and immediate impact.

Chronic hazard: Chronic hazards have a more hidden, cumulative, long-term impact.

Hazards generally fall into one of six groups:

Physical – Slippery floors, objects in walkways, unsafe or misused machinery, excessive noise, poor lighting, fire.

Chemical – Gases, dusts, fumes, vapours and liquids.

Ergonomic – poor design of equipment, workstation design, (postural) or workflow, manual handling, repetitive movement.

Radiation – Microwaves, infra-red, ultraviolet, lasers, X-rays and gamma rays.

Psychological – Shiftwork, workload, dealing with the public, harassment, discrimination, threat of danger, constant low-level noise, stress.

Biological – Infection by bacteria, virus, fungi or parasites through a cut, insect bite, or contact with infected persons or contaminated object.

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