Multiple choice

Global warming has resulted due to

  1. increased level of oxides of sulphur and nitrogen.

  2. increased emissions of CO2 from automobiles.

  3. increased emissions of fine particulates from automobiles.

  4. increased flatulence of animals.
Reveal answer Fill a bubble to check yourself
B Correct answer
Explanation

Global warming has resulted due to increased emissions of CO2 from automobiles. The main cause of it is greenhouse effect. Naturally occurring amounts of greenhouse gases have a mean warming effect of about 33 °C (59 °F). The major greenhouse gas is carbon dioxide (CO2) which causes 9-26% of greenhouse effect.

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