UPSC 2005 Environment and Ecology Questions with Answers
1 previous year UPSC Prelims question on Environment and Ecology in the UPSC 2005 Prelims. Choose an option to see the answer and explanation.
Explanations state facts as of the year each question was asked; words like “recently” refer to that year.
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UPSC 2005Environment and Ecology · Pollution
Q1. 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?
Explanation
The Kyoto Protocol is an international treaty that commits industrialized nations to reducing greenhouse gas emissions (the third Conference of the Parties) in 1997 in Kyoto, Japan.
Statement 1 is correct: The Kyoto Protocol officially came into force on February 16, 2005.
Statement 2 is incorrect: The Kyoto Protocol primarily focuses on reducing greenhouse gas emissions to combat climate change, not on the depletion of the ozone layer. The ozone layer issue is addressed by the Montreal Protocol, which focuses on phasing out substances that deplete the ozone layer.
Statement 3 is correct: Methane (CH₄) is a more potent green-house gas than carbon dioxide (CO₂) in the short term. Although CO₂ persists longer in the atmosphere, methane has a much higher global warming potential over a 20-year period--about 84 times more potent than CO₂.
Answer key for these questions
Q
UPSC year
Correct answer
1
2005
(b) 1 and 3
Frequently asked questions
How many previous year UPSC questions are there on Environment and Ecology?
This page covers 1 previous year UPSC Prelims GS Paper-I questions on Environment and Ecology in the UPSC 2005 Prelims, asked from 1996 to 2025. Each has the correct answer and an explanation.
How should I use previous year UPSC questions for Prelims?
Attempt each question first, then open the answer and read the explanation for every option. Repeat by chapter, and track which statements UPSC reuses across years. Previous year questions show the exam pattern and difficulty level.
Which years are covered for Environment and Ecology?
Questions on Environment and Ecology in the UPSC 2005 Prelims are available for 22 years, from 1996 to 2025. Use the Year filter to practise a single paper.
