Planetary Boundaries
framework
Earth has nine environmental safety limits - and we've already blown past six of them.
Who they are
Planetary Boundaries, a framework developed by scientist Johan Rockström.
What they do
It defines nine safe operating limits for keeping the Earth system stable.
How it works
The nine boundaries are climate change, biosphere integrity, land-system change, freshwater change, biogeochemical flows, ocean acidification, atmospheric aerosols, ozone depletion, and novel entities; as of 2023, six of the nine had been breached.
Why it matters
The engine treats it as the detailed biochemical reality sitting underneath the broader 'persistent pollution' variable in system-collapse modeling.
The engine's record — word for word
Rockstrom framework. 9 safe operating boundaries for Earth system: climate change, biosphere integrity, land-system change, freshwater change, biogeochemical flows, ocean acidification, atmospheric aerosol loading, stratospheric ozone depletion, novel entities. 6 of 9 breached as of 2023. The biochemical granularity underneath World3 persistent pollution variable.
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