"UNEP Report Warns 1.5°C Overshoot Now Unavoidable, Urges Methane Action"
Carbon Budget
Total cumulative CO₂ that can be emitted while staying within a temperature limit.
Overshoot, Peak and Decline
Pathway where temperatures exceed 1.5°C but are brought back down through removal and cuts.
The Paris Agreement (2015), signed by 193 countries and the European Union, set two temperature goals under Article 2: limiting warming to well below 2°C above pre-industrial levels, and pursuing efforts to cap it at 1.5°C. These thresholds are not arbitrary. Climate impacts such as extreme heat, drought, coral bleaching, sea-level rise, and disruption to monsoon patterns intensify non-linearly beyond these levels. The lower threshold was elevated to the more desirable goal because risks are substantially lower at 1.5°C than at 2°C.
The scientific basis for these thresholds rests on the concept of a carbon budget: the total cumulative CO₂ that can be emitted while staying within a temperature limit. Once exhausted, the limit is crossed on a sustained basis. The IPCC's Sixth Assessment Report (AR6) projected that 1.5°C would likely be crossed around 2035 under current emissions trajectories. The UN Environment Programme (UNEP) has tracked this gap annually through its Emissions Gap Reports, measuring the distance between countries' pledged actions and what science demands.
The principle of Common but Differentiated Responsibilities (CBDR), accepted at the 1992 Rio Earth Summit, underpins the entire framework. Developed nations bear greater historical responsibility for cumulative emissions. Developing nations, including India, argue that their development needs must be accommodated and that they deserve financial and technological support. India's updated Nationally Determined Contributions (NDCs) commit to reducing emissions intensity of GDP by 45% by 2030 compared to 2005 levels, and achieving 50% cumulative electric power from non-fossil fuel sources by 2030.
The 1.5°C threshold refers to a long-term average of global surface temperatures above pre-industrial baselines, not a single year's reading. Scientists distinguish between a transient annual breach, caused partly by natural variability, and a sustained crossing measured over decades. A single warm year does not constitute a breach of the Paris Agreement target. This distinction matters because it separates short-term weather noise from long-term structural climate change.
The UNEP report Limiting Overshoot introduces an overshoot, peak and decline pathway. Under this framework, average global temperatures rise above 1.5°C, but countries collectively hold the peak as low as possible and then bring temperatures back down through aggressive emissions reductions and carbon removal. …
"Climate Action Tracker" which monitors the emission reduction pledges of different countries is a:
In the context of mitigating the impending global warming due to anthropogenic emissions of carbon dioxide, which of the following can be the potential sites for carbon sequestration?
1.Abandoned and uneconomic coal seams
2.Depleted oil and gas reservoirs
3.Subterranean deep saline formations
Select the correct answer using the code given below:
Discuss the consequence of Climate change on the food security in tropical countries.
Assess the impact of global warming on the coral life system with examples.
In the context of mitigating the impending global warming due to anthropogenic emissions of carbon dioxide, which of the following can be the potential sites for carbon sequestration?
1.Abandoned and uneconomic coal seams
2.Depleted oil and gas reservoirs
3.Subterranean deep saline formations
Select the correct answer using the code given below:
Consider the following statements regarding the Global Methane Pledge:
1.It commits signatories to cut anthropogenic methane emissions at least 30% below 2020 levels by 2030.
2.India is a signatory to the Global Methane Pledge.
3.Methane is responsible for approximately 0.5°C of current global warming.
4.The Pledge has been signed by more than 100 countries.
Which of the statements given above are correct?
Consider the following statements regarding India's Nationally Determined Contributions (NDCs):
1.India has committed to reducing the emissions intensity of its GDP by 45% by 2030 compared to 2005 levels.
2.India has committed to achieving 50% cumulative electric power from non-fossil fuel sources by 2030.
3.India has joined the Global Methane Pledge as part of its updated NDC commitments.
Which of the statements given above is/are correct?
Match the following climate projections with their corresponding scenario:
List I (Scenario) — List II (Projected Peak Warming)
A.Full delivery on all current national climate pledges — 1. 2.6°C
B.Current policies without additional action — 2. 1.5°C
C.Paris Agreement aspirational limit — 3. 1.8°C
Select the correct match:
Consider the following statements regarding the 'overshoot, peak and decline' pathway described in the UNEP report Limiting Overshoot:
1.Under this pathway, global average temperatures are allowed to rise above 1.5°C before being brought back below that level by the end of the century.
2.The report argues that neutralising a tenth of a degree of warming is easier than preventing that rise in the first place.
3.Carbon Dioxide Removal technologies are identified as a supplement to, not a replacement for, deep emission cuts.
Which of the statements given above is/are correct?
The principle of 'Common but Differentiated Responsibilities' (CBDR) in global climate governance was first formally accepted at which of the following?
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