Very very hazards

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A natural hazard can be considered as a geophysical event which when it occurs in extremes and a human factor is involved that may present a risk. If there is no possibility of a hazard contributing towards an incident, there is no several ways. An agent which has the potential to cause harm to a vulnerable target. History of underwater diving Aqua-Lung History of decompression research and development History of scuba diving List of researchers in underwater diving Porpoise regulator Standard diving dress Timeline of diving technology Underwater diving in popular culture Vintage scuba. Harpenden, England: Terra Publishing. History of underwater diving. Another definition of risk is "the probable frequency and probable magnitude of future losses".

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