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UPSC Combined Geo-Scientist

Chemist

  • 2 objective papers
  • 120 questions each
  • 2 h per paper
  • 100 + 300 marks

Prelims Paper I covers general studies.

UPSC Combined Geo-Scientist, Prelims · 2025 · Paper I, General Studies · Q92 of 120

Geo-Scientist Prelims 2025 General Studies Q92: The global temperature and CO₂ concentration for the last eight…

QuestionClimate change / palaeoclimate

The global temperature and CO₂ concentration for the last eight lakh years were deduced mainly from which one of the following?

  1. (a) Fossil fuel
  2. (b) Tree annual ring
  3. (c) Ice coring in tropical mountain peaks
  4. (d) Ice coring in the Antarctic Plateau

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