48. According to the text, at the current rate of deforestation, the world\'s re

Question

48. According to the text, at the current rate of deforestation, the world's remaining rain forests will be reduced by 50 percent in the year: a. A.D. 1975 b. A.D. 2022 c. A.D. 3012 d. A.D. 2040 49· The burning of fossil fuels increases the emissions of what gas into the atmosphere? a. Oxygen b. carbon dioxide C. ozone d. water vapor 50. The biggest threat to the global ecosystem and to the survival of our own species is: a. overpopulation b. depletion of ozone c. burning of fossil fuels d. desertification

Explanation / Answer

48. As per the current rate the world's forest will react to 50% of ther current value in A.D. 2022, hence "C" is correct answer.

49. Burning of fossil fuel produce CO2 (Carbon dioxide) in the atmosphere, hence O2 (Carbon dioxide) emission will takes place due to burning of fossil fuels, hence "C" is correct answer.

50. All the options given in the question i.e. burning of fossil fuel, depletion of ozone and desertification are because of overpopulation and hence "A" is correct answer.

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