Correct Answer - Option 1 : biological disaster
Disaster is an undesirable catastrophe resulting from forces that are largely beyond human control, strikes quickly with little or no warning, and causes or threatens serious disruption of life and property. For example, earthquakes, tsunami, cyclones, floods, etc.
Natural Disasters are broadly categorized as −
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Atmospheric disasters include blizzards, thunderstorms, lightning, tropical cyclone, tornado, drought, hailstorms, frost, heatwave, cold waves, etc.
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Terrestrial disasters include earthquakes, volcanic eruptions, landslides, avalanches, subsidence, etc.
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Aquatic disasters include flood, tidal waves, storm surge, tsunami, etc.
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Biological disasters include fungal, bacterial, and viral diseases (e.g. bird flu, dengue, etc.).
Hence, we can conclude that Dengue is a Biological disaster.
Disasters are normally caused by nature (beyond human control), however, there are many human-induced disasters.
- For example, the Bhopal Gas tragedy, Chernobyl nuclear disaster, wars, the release of CFCs (Chlorofluorocarbons), releasing greenhouse gases.
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The disasters are global in nature; hence, to combat them, the United Nations made a systematic strategy at the World Conference on Disaster Management held in May 1994 at Yokohama, Japan.