To understand the basics of the following Natural disasters- significance, nature, types and effects - floods, drought, cyclone,

earthquakes, landslides, avalanches, volcanic eruptions, heat and cold waves, climatic change - global warming - sea level rise -

ozone depletion. Manmade disasters- nuclear , chemical, biological, building fire, coal fire, forest fire, oil fire, air pollution, water

pollution, deforestation, industrial waste water pollution, road accidents, rail accidents, air accidents and sea accidents.