360° UPSC Mains Analysis

Global warming will exceed limit, UN says in a report that maps path to get back below danger zone

One story, six UPSC lenses — AI-researched against official sources, fact-checked, and free. No login needed.

Flora & Fauna

Warm-water Coral Reefs
Status: Critically endangered ecosystem
Threat: High risk of near-complete extinction (99% loss) if global warming exceeds 1.5°C.
Amazon Rainforest
Status: Vulnerable ecosystem
Threat: Risk of irreversible dieback and transition into a dry savannah due to prolonged drought and warming [1.2.2].
Himalayan Glaciers
Status: Vulnerable ecosystem
Threat: Accelerated melting leading to glacial lake outburst floods (GLOFs) and loss of seasonal freshwater supply.

Ecology Impact

The 1.5°C overshoot threatens fragile ecosystems like the Himalayan glaciers, leading to glacial lake outburst floods (GLOFs) and severe downstream water stress. It risks triggering irreversible tipping points, including the dieback of the Amazon rainforest, collapse of the West Antarctic and Greenland ice sheets, and the shutdown of the Atlantic Meridional Overturning Circulation (AMOC).

Science & Tech Angle

The 'overshoot, peak, and decline' pathway relies heavily on Carbon Dioxide Removal (CDR) technologies, including Bioenergy with Carbon Capture and Storage (BECCS) and Direct Air Capture (DAC). These novel technologies are required to achieve net-negative emissions, as conventional land-based methods like afforestation can only reduce global temperatures by approximately 0.1°C.

Climate Change Link

The UNEP report 'Limiting Overshoot' (2026) highlights that current policies will lead to a median warming of 2.6°C by 2100, far exceeding the Paris Agreement's 1.5°C target. To limit the overshoot, global greenhouse gas emissions must fall by 55% from 2019 levels by 2035, requiring immediate transition to net-negative emissions and scaling up Carbon Dioxide Removal (CDR) technologies.

Sustainable Development

The overshoot directly threatens SDG 13 (Climate Action), SDG 14 (Life Below Water) through ocean warming, and SDG 15 (Life on Land) through habitat loss. It also undermines SDG 1 (No Poverty) and SDG 2 (Zero Hunger) as climate-induced disasters disproportionately impact vulnerable populations, reducing agricultural yields and increasing water scarcity.

International Frameworks

Paris Agreement (2015)
Article 2.1(a) aims to limit global warming to well below 2°C, preferably to 1.5°C, above pre-industrial levels [1.2.2].
United Nations Framework Convention on Climate Change (UNFCCC)
Serves as the parent treaty for the Paris Agreement, coordinating global efforts to stabilize greenhouse gas concentrations.
United Nations Environment Programme (UNEP)
Published the 'Limiting Overshoot' report (2026) outlining the 'overshoot, peak, and decline' pathway.
Intergovernmental Panel on Climate Change (IPCC)
Provides the scientific assessments on warming thresholds, carbon budgets, and the impacts of exceeding 1.5°C.

Sources consulted

AI-generated study aid. Grounded in web research, but verify critical facts against official sources before your exam.

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