What is the common examiner trap about Environment in UPSC exams?

They may ask which RCP scenario has been retired (RCP8.5) and confuse it with the new highest scenario (SSP5-8.5, which projects ~4.4°C). Another trap is linking the retirement solely to policy action, while the article credits renewable energy transition and slower emissions growth.

What should UPSC aspirants remember about Environment for Prelims?

1. Target this Data: New highest warming projection is ~3.5°C (down from ~5°C under RCP8.5). 2. Target this Nodal Body: Intergovernmental Panel on Climate Change (IPCC) and its upcoming 7th Assessment Report (AR7). 3. Target this Legal Point: The Paris Agreement's CBDR-RC principle and its 1.5°C/2°C warming limits.

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IPCC CMIP7 Scenarios Retire RCP8.5, Project Warming Up to 2.8°C; 1.5°C Goal Now Requires Overshoot

Q: Which United Nations body is responsible for the climate assessment reports that use scenarios like RCPs and SSPs?

Intergovernmental Panel on Climate Change (IPCC), The article explicitly mentions the UN Intergovernmental Panel on Climate Change (IPCC) and its forthcoming seventh assessment report. The IPCC is the UN body tasked with assessing the science related to climate change.

Q: Consider the following statements regarding the recent update in climate modelling scenarios: 1. The high-emission scenario RCP8.5, projecting over 4°C warming by 2100, has been retired as implausible. 2. The primary reason for retiring RCP8.5 is the rapid transition to renewable energy and plateauing emissions in major economies like China. 3. The new scenarios indicate that limiting global warming to 1.5°C above pre-industrial levels, as per the Paris Agreement, is still achievable without any overshoot. Which of the statements given above is/are correct?

Both 1 and 2, Statement 1 is correct as the article states RCP8.5 has been 'officially retired'. Statement 2 is correct as the article cites 'rapid transition to renewable energy' and 'emissions... plateauing in China' as key reasons. Statement 3 is incorrect because the article clearly states scenarios adhering to 1.5°C are 'no longer possible without overshoot'.

Q: According to the new CMIP7 climate scenarios, what is the projected global warming by 2100 under the current emissions trajectory?

Up to 2.8°C, The article states: 'Based on the current emissions trajectory, the world is close to the medium pathway in the new CMIP7 illustrative scenarios: with an expected warming of up to 2.8° C by the end of the century.' 3.5°C is the new highest emission scenario, not the current trajectory.

Q: What is the key implication of the new climate scenarios for climate-vulnerable countries like India?

Exposure to extreme events remains high across all warming scenarios., The article quotes a climate researcher stating that India 'is highly exposed to extreme events, in all scenarios'. It emphasizes that the 'imperative to adapt... remains high' and that deep emissions cuts by developed nations are crucial, contradicting the other options.

Environment Science & Tech Intl. RelationsHIGH

Target:UPSC GS-IIIMPSCTeachingSSC GAPrelims HighMains HighStatic GK Link

04 Jun 2026

~2 min

Source: The Hindu

Key Data:~3.5°C (new highest warming)Up to 2.8°C (current trajectory)1.5°C (Paris Agreement limit)

Bodies:IPCCPBL Netherlands Environmental Assessment AgencyIndian Institute of ScienceIndian Institute for Human Settlements

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~2 min · Quick mode

What This Article Covers

1.The UN IPCC's new CMIP7 scenarios have retired the high-emission RCP8.5 scenario, projecting a new highest warming of ~3.5°C by 2100 instead of ~5°C, due to rapid renewable energy transition.

2.Despite this, the current emissions trajectory puts the world on a pathway to ~2.8°C warming by 2100, making it impossible to stay below 1.5°C without temporary overshoot, increasing risks of irreversible change.

3.For India, this means continued high exposure to extreme climate events across all scenarios, underscoring the critical need for adaptation and deep emissions cuts by developed nations under the Paris Agreement's CBDR-RC principle.

The Big Picture

Prelims · HighMains · High

The UN IPCC's new climate modelling scenarios (CMIP7) have officially retired the extreme RCP8.5 'doomsday' scenario, projecting a lower worst-case warming of ~3.5°C by 2100. However, the world is now on a medium pathway towards 2.8°C warming, and achieving the Paris Agreement's 1.5°C target is impossible without temporary overshoot, posing severe adaptation challenges for India.

Exam Lens

Quick Exam Facts From News

Retired ScenarioRCP8.5 (worst-case, >4°C warming)

New Highest Warming~3.5°C by 2100

Current Trajectory WarmingUp to 2.8°C by 2100

Key Report7th IPCC Assessment Report (Upcoming)

1-Minute Revision

›Retired Scenario: RCP8.5 (worst-case, >4°C warming)
›New Highest Warming: ~3.5°C by 2100
›Target this Data: New highest warming projection is ~3.5°C (down from ~5°C under RCP8.5).
›Target this Nodal Body: Intergovernmental Panel on Climate Change (IPCC) and its upcoming 7th Assessment Report (AR7).
›Target this Legal Point: The Paris Agreement's CBDR-RC principle and its 1.5°C/2°C warming limits.

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News Snapshot

📉

RCP8.5 Retired

The UN IPCC's worst-case climate scenario (RCP8.5) has been officially retired after 15 years due to slower emissions growth and renewable energy adoption.

🌡️

Overshoot Inevitable

The new CMIP7 scenarios show the Paris Agreement's 1.5°C warming limit cannot be achieved without temporary overshoot, increasing climate risks.

🇮🇳

India's High Vulnerability

India remains highly exposed to extreme climate events even under moderate warming scenarios, necessitating urgent adaptation and mitigation efforts.

Detailed Analysis & Strategic Depth

Context / Background

Climate models use Representative Concentration Pathways (RCPs) and Shared Socioeconomic Pathways (SSPs) to project future warming based on emissions. The RCP8.5 scenario, developed around 2010, assumed a fossil-fuel-intensive future with >4°C warming by 2100. It was widely misrepresented as 'business-as-usual' in media and studies, despite being an edge case. The new CMIP7 scenarios update these projections with recent data on renewable energy growth and climate policies.

Core Analysis & Implications

The retirement of RCP8.5 is driven by the rapid global shift to renewables, especially in China, and plateauing emissions in major economies. The new highest emission scenario projects ~3.5°C warming. However, the medium pathway (current trajectory) leads to ~2.8°C warming, still within 'dangerous' territory. Crucially, all pathways to 1.5°C now require overshoot—temporarily exceeding the limit before drawing down CO2 via unproven carbon removal technologies. This increases the risk of crossing irreversible climate tipping points.

Future Outlook / Way Forward

The scientific focus shifts to understanding impacts at 2-3°C warming, which still pose severe risks like droughts in breadbasket regions and extreme rainfall. For India, adaptation remains a critical but insufficient strategy. The article emphasizes the need for 'deep and rapid emissions cuts by developed countries' aligned with the Common But Differentiated Responsibilities and Respective Capabilities (CBDR-RC) principle of the Paris Agreement. Future climate sensitivity estimates may still revise risks upward.

Key Facts at a Glance

Retired ScenarioRCP8.5 (worst-case, >4°C warming)

New Highest Warming~3.5°C by 2100

Current Trajectory WarmingUp to 2.8°C by 2100

Key Report7th IPCC Assessment Report (Upcoming)

You've read the full analysis. Now test your understanding.

Practice exam-style questions based on this article.

Q1Static LinkageEasyUPSC, SSC, State PSC

Which United Nations body is responsible for the climate assessment reports that use scenarios like RCPs and SSPs?

Q2Statement-basedHardUPSC

Consider the following statements regarding the recent update in climate modelling scenarios:

1. The high-emission scenario RCP8.5, projecting over 4°C warming by 2100, has been retired as implausible.

2. The primary reason for retiring RCP8.5 is the rapid transition to renewable energy and plateauing emissions in major economies like China.

3. The new scenarios indicate that limiting global warming to 1.5°C above pre-industrial levels, as per the Paris Agreement, is still achievable without any overshoot.

Which of the statements given above is/are correct?

Q3Data-centricMediumUPSC, SSC

According to the new CMIP7 climate scenarios, what is the projected global warming by 2100 under the current emissions trajectory?

Q4Application/ImpactMediumUPSC, State PSC

What is the key implication of the new climate scenarios for climate-vulnerable countries like India?

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IPCC CMIP7 Scenarios Retire RCP8.5, Project Warming Up to 2.8°C; 1.5°C Goal Now Requires Overshoot

Exam Lens

Quick Exam Facts From News

1-Minute Revision

News Snapshot

RCP8.5 Retired

Overshoot Inevitable

India's High Vulnerability

Detailed Analysis & Strategic Depth

Context / Background

Core Analysis & Implications

Future Outlook / Way Forward

Prelims Flashpoints

Key Facts at a Glance