Civil Services Prep

Prelims MCQ · Geography

Which one of the following best explains the meteorological importance of atmospheric carbon dioxide?

  1. It allows incoming solar radiation to pass through but absorbs outgoing terrestrial radiation and returns some of it towards the Earth’s surface.
  2. It absorbs ultraviolet radiation between 10 and 50 km and prevents it from reaching the surface.
  3. It forms hygroscopic nuclei around which atmospheric water vapour condenses.
  4. It reflects radio waves transmitted from the Earth back towards the surface.