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Question No. 96Interactive Test Mode
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Q96. Consider the following statements: 1. Kyoto protocol came into force in the year 2005. 2. Kyoto protocol deals primarily with the depletion of the ozone layer. 3. Methane as a greenhouse gas is more harmful than carbon dioxide. Which of the statements given above is/are correct?

Consider the following statements:

  1. Kyoto protocol came into force in the year 2005.
  2. Kyoto protocol deals primarily with the depletion of the ozone layer.
  3. Methane as a greenhouse gas is more harmful than carbon dioxide. Which of the statements given above is/are correct?
Select the correct option below (or cross out options to eliminate)

Official Answer Key & Detailed Solution

Ready to check the official UPSC Answer Key?

Click any option above to test yourself under exam conditions, or reveal the explanation directly.

Official UPSC Answer KeyUPSC Prelims 2005 • Environment and Ecology

Correct Answer: Option (B) — 1 and 3

Concept & Option Breakdown

Standard Reference Verified
  • Statement 1 is correct: Adopted in 1997 in Kyoto, Japan, the Kyoto Protocol officially entered into force on 16 February 2005 after ratification conditions were met.
  • Statement 2 is incorrect: The Kyoto Protocol targets greenhouse gas emissions to mitigate anthropogenic climate change. Ozone layer depletion is addressed by the 1987 Montreal Protocol.
  • Statement 3 is correct: Methane (CH4) has a significantly higher Global Warming Potential (GWP) than CO2 (approx. 28–36 times over 100 years and ~84 times over 20 years), making it much more potent per unit mass.
Elimination Heuristic & Exam Approach

Ozone depletion is governed by the Montreal Protocol, not Kyoto. Eliminating Statement 2 immediately eliminates option (a).

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Question Specifications & Syllabus Mapping

Examination & YearUPSC Civil Services Preliminary Examination 2005 (Q96)
Paper & Marking SchemeGS Paper I • 2 Marks (-0.66 Negative for incorrect response)
Syllabus Subject & TopicEnvironment and Ecology → Climate Change & Global Warming
Official Answer KeyOption (B) — 1 and 3

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Frequently Asked Questions — UPSC Prelims 2005 Q96

What is the official answer for UPSC Prelims 2005 GS Paper I Question 96 (Environment and Ecology)?

The official UPSC answer key for this 2005 Environment and Ecology (Climate Change & Global Warming) question is Option (B): "1 and 3". Correct attempts carry 2 Marks with -0.66 Negative penalty for wrong answers.

Which UPSC Prelims syllabus topic does this 2005 question belong to?

This question belongs to GS Paper I under the subject "Environment and Ecology" and micro-topic "Climate Change & Global Warming". You can explore all repeated questions from Climate Change & Global Warming in Acme AI's 3D Prelims PYQ Realm or practice 50 full-length and sectional tests in the APT Prelims Test Series.

How can I solve this Climate Change & Global Warming UPSC Prelims question using option elimination?

Ozone depletion is governed by the Montreal Protocol, not Kyoto. Eliminating Statement 2 immediately eliminates option (a).

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