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Exploring pathways for world development within planetary boundaries
Detlef P van Vuuren1,2, Jonathan C Doelman3,4, Isabela Schmidt Tagomori3
1Netherlands Environmental Assessment Agency (PBL), The Hague, The Netherlands. detlef.vanvuuren@pbl.nl.
Nature
|May 14, 2025
Summary
Humanity is exceeding planetary boundaries, risking Earth's stability. Even with policy interventions, climate change, biogeochemical flows, and biodiversity will remain transgressed by 2050, requiring stronger environmental policies.
Area of Science:
- Environmental science
- Earth system science
- Sustainability science
Background:
- Human activities are destabilizing Earth's environment.
- The planetary boundaries framework defines a safe operating space for humanity.
- Evaluating trends is crucial for identifying sustainable pathways.
Purpose of the Study:
- To project the state of eight planetary boundaries by 2050 under different policy scenarios.
- To assess the impact of environmental policies on Earth's stability.
- To identify pathways for humanity to live within planetary boundaries.
Main Methods:
- Utilized the Integrated Model to Assess the Global Environment (IMAGE).
- Projected control variables for eight of nine planetary boundaries.
- Analyzed scenarios with and without strong environmental policies until 2050.
Main Results:
- Current trends and policies project worsening conditions for most planetary boundaries by 2050, except ozone depletion.
- Targeted interventions (e.g., Paris Agreement, dietary shifts, resource efficiency) can reduce boundary transgressions.
- Inertia means climate change, biogeochemical flows, and biodiversity will likely remain transgressed in 2050 even with interventions.
Conclusions:
- Significant policy action is needed to ensure humanity operates within planetary boundaries.
- Current trajectories are unsustainable, highlighting the urgency for enhanced environmental governance.
- Achieving sustainability requires addressing systemic inertia and implementing more effective, feasible policy measures.
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