Multiple choice

Which of the following statements are 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.

  1. I and III

  2. II and III

  3. II, III and IV

  4. III and IV
Reveal answer Fill a bubble to check yourself
D Correct answer
Explanation

Greenhouse gases are responsible for global warming. But they cannot be eliminated as one of them is CO2 , which is essential for plants to synthesise food. CO2 is not the most dangerous gas, it is said so just because it is present in highest concentration in the atmosphere. Otherwise, on per molecule basis, the most dangerous greenhouse gas is methane.

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