Answer:Unlimited exploitation of nature by man should be the chief concern of the whole mankind. The unfavorable conditions created by man not only threatened the life of man himself but also all other living creatures of the Universe. Thus, pollution control in the world is the latest environmental concern. Knowingly or unknowingly, human beings are polluting the environment and nature is at the verge of extinction. Man has developed new systems for the better quality of life but he is not realizing the harmful effects indirectly in another form. More and more trees have been cut down to make use of land for construction purposes. The number of vehicles on the road is increasing which is the main reason of air pollution.It is time that we should all wake up and  work together in protecting our natural world...

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