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📌 The Question:

The “Common Carbon Metric”, supported by UNEP, has been developed for:

(a) assessing the carbon footprint of building operations around the world
(b) enabling commercial farming entities around the world to enter carbon emission trading
(c) enabling governments to assess the overall carbon footprint caused by their countries
(d) assessing the overall carbon footprint caused by the use of fossil fuels by the world in a unit time

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✅ Correct Answer: (a)

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🧠 Classroom Explanation:

The Common Carbon Metric (CCM) is an initiative supported by the United Nations Environment Programme (UNEP) to provide a standardized method for measuring, reporting, and verifying greenhouse gas (GHG) emissions from building operations across the world.

🔹 It focuses specifically on:
• Operational emissions from buildings (energy use for lighting, heating, cooling, etc.)
• Consistency across regions and climates
• Comparable reporting irrespective of country or building type

🔹 What it does NOT do:
• It is not a carbon trading mechanism
• It is not a national-level carbon accounting framework
• It does not assess global fossil-fuel emissions per unit time

Hence, option (a) precisely captures its purpose.

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🔍 Curiosity Raiser:
🏢 Did you know?
Buildings account for nearly 40% of global energy-related CO₂ emissions when construction and operations are combined. Measuring them correctly is half the battle in climate action.

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📚 Enrich Notes (Prelims Booster):

• Common Carbon Metric ≠ Building Rating Tool

• It measures emissions
• It does NOT benchmark or rank buildings

• Why UNEP pushed CCM?

• Buildings differ vastly across countries
• A common “carbon language” was needed

• Exam Trap to Avoid:

• “Carbon Metric” does NOT automatically mean carbon trading
• CCM is sector-specific (buildings), not economy-wide

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🪶 IAS Monk Whisper:
What gets measured gets managed — and buildings were long left unmeasured.