04/09/2026
🌍 The world is about to cross 1.5°C. This is not the end of the goal—but it is the consequence of decades of insufficient action.
According to the newly published UNEP report, Limiting Overshoot, exceeding 1.5°C of global warming is now widely assessed as unavoidable. The threshold established by the international community through the Paris Agreement was never an arbitrary number: it represented a critical attempt to limit the risks of pushing human and natural systems into increasingly dangerous and potentially irreversible conditions.
The challenge we now face is called overshoot.
The question is no longer simply whether we will cross 1.5°C, but how far above it we will go, how long we will remain there, and how quickly we can return below it.
Every fraction of a degree matters.
Higher temperatures mean greater risks for ecosystems, biodiversity, food and water security, human health, cities and infrastructure. The longer and higher the overshoot, the greater the probability of crossing irreversible tipping points and adaptation limits.
This is particularly relevant for cities.
Cities are where millions of people will experience the consequences of climate change most directly: heat waves, flooding, drought, water stress and increasing thermal discomfort. Urban adaptation can no longer be treated as a secondary environmental policy.
From an IMM perspective, mitigation and adaptation must become part of a single systemic transformation.
🌳 Green and blue infrastructure
💧 Water-sensitive urban design
🏙️ Climate-responsive urban morphology
🚶 Reduced car dependency
⚡ Energy-efficient buildings
🌿 Nature-Based Solutions
🔄 Circular urban systems
But we must avoid another simplification.
Planting trees alone will not solve climate change.
Adaptation alone will not solve climate change.
The city must become part of a broader transition in which emissions are drastically reduced while urban systems are simultaneously redesigned to protect people and ecosystems from the impacts that are already unavoidable.
The UNEP message is clear: overshoot is not a reason for resignation. It is a reason for greater urgency.
We have already entered unfamiliar territory.
The question now is whether we continue to react to the consequences—or finally transform the systems that are producing them.
1.5°C was a warning line. Crossing it does not mean that the difference between 1.6°C, 1.8°C or 2°C no longer matters.
It matters enormously.
🌍 There is no safe excuse for inaction—and no fraction of a degree that is not worth fighting for.
Read UNEP’s Limiting Overshoot report