Everything in the world is changeable.Nothing remains constant as it used to before.the earth has been changing since its origin.the earth is made of land and water, which is the shelter of all the living beings.there is mutual interdependence between/among all the flora and fauna,including sea-animals.there are so many agents that bring changes on the earth.the main agent is the man whose activities in the existence for struggle cause drastic change.As a result,the delicate balance in the ecosystem gets disturbed.because of rapid growth in population,the environment-everything around us-is becoming dirtier and uglier.ultimately,human life is getting more difficult.population is derived from the world pollute which means make dirty,destroy the purity or sanctity of natural environment.environment includes all the physical and culture elements,living and non living things and man himself.there is reciprocal interrelationship between plants and animals.
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