Which of the following statements is correct? I. Greenhouse gases are responsible for global warming. They should be eliminated to save the planet II. CO2 is the most dangerous of the greenhouse gases. Reduction in the release of CO2 would surely bring down the temperature III. The greenhouse effect could be traced back to the industrial revolution. But the current development and the patterns of life have enhanced their emissions IV. Deforestation has been one of the biggest factors contributing to the emission of greenhouse gases
Explanation:
Greenhouse gases are one reason for global warming. However, statement I goes quite beyond the scope of the passage, eliminating it. Statement II is incorrect as methane is twenty one times stronger in heat trapping than CO2 (Paragraph eight). Statement III is stated in the passage. Statement IV is stated in paragraph 9 as one of the biggest factors contributing to the emission of green house gases. Hence, the correct answer is option 4.
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