---
title: Planetary Boundaries | one to ONE Holdings
description: "Planetary Boundaries: Nine Earth systems where 7 thresholds, including ocean acidification, are breached. Learn to transition toward global resilience."
image: https://www.o2oh.com/hubfs/PB_2025.png
---

Perfecting imperfections with one to ONE

# Glossary

### GLOSSARYTerms A-Z

- [Glossary](https://www.o2oh.com/glossary)
- [ALL](https://www.o2oh.com/glossary?val=all)
- [A～G](https://www.o2oh.com/glossary?val=a_g)
- [H～N](https://www.o2oh.com/glossary?val=h_n)
- [O～U](https://www.o2oh.com/glossary?val=o_u)
- [V～Z](https://www.o2oh.com/glossary?val=v_z)
- [Numbers ・ Symbols](https://www.o2oh.com/glossary?val=0_9)

# Planetary Boundaries

The Planetary Boundaries framework establishes the biophysical constraints necessary for a stable human habitat. This model tracks nine key Earth system processes.

 Alarmingly, by 2025, seven—including climate change, biosphere integrity, land-system change, freshwater change, biogeochemical flows, novel entities, and the recently breached ocean acidification—have exceeded their "safe operating space." 

![Radar chart of 9 Planetary Boundaries. Green center is the safe zone. 7 wedges breach this into orange (risk) or red (high risk): Climate, Novel Entities, Biosphere, Land, Water, Biogeochemical flows, and Ocean Acidification. Ozone and Aerosols stay safe.](https://www.o2oh.com/hs-fs/hubfs/PB_2025.png?width=619&height=585&name=PB_2025.png)

The current challenge is that these breaches compound, with one threshold crossing triggering irreversible shifts in others.

To maintain global stability, we must urgently shift from extraction-based growth to a [circular economy](https://www.o2oh.com/glossary/circular-economy) that aprioritizes regenerative resilience within these biophysical limits.

 

The evolution of the planetary boundaries framework (Source: Stockholm Reilience Centre). Licenced under CC BY-NC-ND 3.0 (Credit: Azote for Stockholm Resilience Centre, Stockholm University. Based on Sakschewski and Caesar et al. 2025, Richardson et al. 2023, Steffen et al. 2015, and Rockström et al. 2009).

### RELATED WORDS

---

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- [Potential Reversal Phenomenon](https://www.o2oh.com/glossary/potential-reversal-phenomenon)
- [Paris Agreement](https://www.o2oh.com/glossary/paris-agreement)
- [Protective Film Effect](https://www.o2oh.com/glossary/protective-film-effect)
- [Pure Zinc Layer](https://www.o2oh.com/glossary/pure-zinc-layer)
- [Pre-Galvanizing](https://www.o2oh.com/glossary/pre-galvanizing)
- [PCR (Product Category Rules)](https://www.o2oh.com/glossary/pcr-product-category-rules)
- [Product Lifecycle Management (PLM)](https://www.o2oh.com/glossary/product-lifecycle-management-plm)

Copyright © one to ONE Holdings Pte. Ltd. All Rights Reserved.

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