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UN Report Says 1.5°C Breach Is Now Unavoidable
A new United Nations report says the world will probably pass the 1.5°C warming limit.
This limit is not a switch that suddenly causes a climate disaster, but staying below it would reduce many dangers.
In the best possible scenarios, temperatures may rise to at least 1.8°C before coming down.
Other scenarios could reach more than 2°C.
More warming can bring stronger heatwaves, floods, droughts, wildfires and damage to nature.
It can also threaten ice sheets, coral reefs, the Amazon rainforest and ocean currents.
Countries must quickly reduce greenhouse-gas emissions and protect people from impacts that are already happening.
Eventually, temperatures could only be lowered through net-negative emissions, meaning removing more carbon dioxide than is released.
The UNEP report says no plausible scientific pathway remains to keep warming below 1.5°C.
Even the best-case scenarios could see warming reach at least 1.8°C before declining.
The report warns that every additional fraction of warming increases risks to people, ecosystems and economies.
Returning below 1.5°C would require sustained net-negative carbon dioxide emissions after global net zero.
India’s 2035 targets include 60% non-fossil electricity capacity and a 47% reduction in emissions intensity from 2005 levels.
- Who
- The United Nations Environment Programme, climate scientists and governments assessing global warming.
- What
- A UNEP report says crossing the 1.5°C warming threshold is unavoidable and outlines measures to limit the overshoot.
- Where
- The findings concern global temperatures, with impacts expected worldwide, including in vulnerable regions, small island states and low-lying coastal cities.
- When
- The report is the latest assessment discussed in the article; 2024 was the first year with an annual average above 1.5°C, at 1.55°C.
- Why
- The report says rapid emissions cuts, adaptation and eventual net-negative carbon dioxide emissions are needed to reduce the severity and duration of warming beyond 1.5°C.
Limit Overshoot
Prepare for Continued Warming
Main climate strategy
Limit Overshoot
Countries should rapidly cut emissions to minimise the amount and duration of warming beyond 1.5°C.
Prepare for Continued Warming
Because some overshoot is now considered unavoidable, countries must also strengthen adaptation and protect vulnerable people, ecosystems and infrastructure.
Meaning of crossing 1.5°C
Limit Overshoot
The threshold remains an important defence line because staying closer to it reduces risks and limits irreversible damage.
Prepare for Continued Warming
Crossing 1.5°C is not an instant climate apocalypse or a permanent switch; risks increase progressively with each additional fraction of warming.
How to reduce temperatures
Limit Overshoot
Emissions reductions and reaching net zero should be the immediate priorities.
Prepare for Continued Warming
If temperatures are later to decline, the world will additionally need sustained net-negative CO₂ emissions, which becomes harder and more expensive as warming rises.
Key facts
- Report
- UNEP report titled “Limiting Overshoot”
- Best-case peak
- At least 1.8°C above pre-industrial levels before temperatures decline
- Common baseline
- 1850–1900, generally used by climate scientists to represent pre-industrial temperatures
- 2024 warming
- 1.55°C above pre-industrial levels, making it the warmest year recorded
- Paris Agreement
- Countries agreed to keep warming well below 2°C and pursue efforts to limit it to 1.5°C
- Required temperature decline
- Sustained net-negative CO₂ emissions after global net zero
- India’s 2035 electricity target
- At least 60% of installed electricity capacity from non-fossil sources
- India’s 2035 emissions target
- At least a 47% reduction in emissions intensity from 2005 levels
Quotes
UNEP report
United Nations Environment Programme report on limiting climate overshoot
“We are at a point where there are no plausible scientific pathways left that keep temperatures below 1.5 degree Celsius”
indianexpress.com
Sources
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