An essay on natural disasters
Answers
A natural disaster is unforeseen, severe and immediate. Pollution, ozone depletion in the stratosphere and global warming come in this category. Natural disasters include cyclones, earthquakes, floods, drought (though these two are now being increasingly considered ‘man- made’ disasters) heat and cold waves, landslides, avalanches, flash floods, severe thunderstorms, hail, low level wind shears, and microburst.
The destructive potential of any natural hazard is estimated basically by its spatial extent and severity. Spatial extent upto which the effect of a disastrous event could be felt may easily be classified into small, medium and large scales. The phenomenon extending from a few kilometers to a few tens of kilometers are termed as small scale.
Growing industrialisation and unjustified exploitation of natural resources have brought our echo system to a verge of non-reversibility and imbalance. This has led to a threat from a set of natural hazards like pollution, global warming and ozone depletion on large or global scale.
Some of the resources we have got from nature are called Natural resources. Air, sunshine, water, land, animal, vegetation, soil, metals, petroleum and minerals are the examples of natural resources.These resources are essential for the survival on this earth with no production and some are with no limitations like sunshine, air, land, soil and water.Human cannot produce or make natural resources but can use it in such manner to produce other essential resources that are important for our life. Wood obtained from trees can be used for making important things for life like house furniture and paper. Oil is refined, so that can be used for cooking food. Minerals and metals are used for making usable things for our daily life like coins, steel and jewellery, land soil and water are used for plantation of trees and with the use of plants and trees we get vegetables and fruits; sunshine is used for producing solar energy.Natural resources are of two types one that can be regained or reproduced is called Renewal Resources and other that cannot be regained is called Non renewal Resources. Wood, vegetation, animal, water, air and sunlight are the example of Renewal resources. Some of these are reproduce with low rate or low frequency and higher consumption rate of them may be the cause of non availability of natural resources in future like water, fresh air, plants and animal. Coal, minerals, metals and petroleum are counted in list of non-renewal resources which are limited in quality and hidden under the land of this earth.Using and consuming natural resources should be managed in such manner that rate of production would always more than rate of consumption especially in matter of plants, animals, fresh air and water. Non-renewal resources are very limited in quantity and cannot be recollected from nature at any cost. Even renewal resources should also be consumed with extra care by keeping in mind the importance of these resources for our life.