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★ NEW Preorder Ancient and Medieval Indian History ⚡️ Shipping from Aug 15^th ★ ★ NEW Prelims Cracker 2027 ⚡️ New Subjects from Sep 1^st 📞 Call Now: 9211591415 ★ ★ NEW GS Foundation 2027 ⚡️ Just Started ⬇️ Download Brochure 📞 Call Now: 9211591415 ★ ★ PMF IAS Impact 🎯 53 Direct Hits in Prelims 2025 and 🎯 46 Direct Hits in Prelims 2026 ★

Carbon Dioxide

Direct Air Capture — UPSC Prelims PYQ 2025

Atmosphere’s role in Earth’s temperature — UPSC Prelims PYQ 2025

UPSC Prelims PYQ 2024: Rainfall and weathering — CO2 and dissolved oxygen in rainwater

UPSC Prelims PYQ 2023: Activities considered for carbon capture and sequestration

Definition of Social Cost of Carbon — UPSC Prelims PYQ 2020

What is carbon fertilisation? — UPSC Prelims PYQ 2018

Carbon sequestration sites: coal seams, reservoirs, saline formations – UPSC Prelims PYQ 2017

Sources adding CO2 to carbon cycle UPSC Prelims PYQ 2014

Jeevan Bisht
2014 / Environment / Environment Basics / UPSC Prelims PYQs
Carbon Cycle / Carbon Dioxide / Photosynthesis / Respiration / Volcanic Action

Why CO2 raises atmospheric temperature — UPSC Prelims PYQ 2012

UPSC Prelims PYQ 2011: Which processes add CO2 to the carbon cycle?

CO2 removal from lower atmosphere — UPSC Prelims PYQ 2011

PMF IAS
2011 / Climate Change / Environment / UPSC Prelims PYQs
Carbon Dioxide / Carbon Sink / Lower Atmosphere / Ocean Photosynthesis / Phytoplankton

Emissions from coal-fired thermal power plants — UPSC Prelims PYQ 2011

UPSC Prelims PYQ 2005: Kyoto Protocol and greenhouse gases

PMF IAS
2005 / Environment / Environmental Conventions / Environmental Laws / UPSC Prelims PYQs
Carbon Dioxide / Climate Change / Greenhouse gases / Kyoto Protocol / Methane

Human life on Venus — Assertion–Reason UPSC Prelims PYQ 2005

Properties of Magma — Volatiles and Types (UPSC Prelims PYQ 2001)

PMF IAS
2001 / Geography / Geomorphology / Physical Geography / UPSC Prelims PYQs
Basaltic Magma / Carbon Dioxide / Magma / Volcanic Gases / Water Vapour