Answers

2015-07-27T19:59:07+05:30
Because humans destroyed forests.Now tat forests have turned to deserts
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2015-07-28T10:29:42+05:30
Human beings especially after the Industrial Revolution have had a major role in transforming the crust on which we live .
        Oil is essential material for human life to run the mills , factories and transporting vehicles to get the crude oil , drilling in the deserts is being carried since many years . There are water sources like oases , which is needed for growing crops . The sand and stones of the deserts are used in construction of buildings , palaces etc .
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