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ClimateQuiet 2d · day 3

Planetary Boundaries Report: 7 of 9 'livability limits' now breached

Annual Planetary Health Check finds seven environmental boundaries at worst levels on record, with shrinking margin for error.

newest coverage 2d agosummary written 22h ago3 pieces6 likes & upvotes MastodonGoogle News

What to know

  • Seven of nine planetary boundaries—physical and chemical limits needed to keep Earth habitable—are now at their worst recorded values since the framework was established in 2009.
  • Carbon dioxide concentrations reached 426 ppm, more than 50% above the preindustrial baseline of 280 ppm and well past the 350 ppm safety threshold scientists consider safe.
  • Lead scientist Boris Sakschewski warns that the risk of large-scale, persistent, and potentially irreversible environmental change is rising while humanity's margin for error shrinks.

“It's like blood pressure. A high value is not a guarantee that you're going to have a heart attack, but it raises the risks of one.”

Katherine Richardson, Earth systems scientist, University of Copenhagen · Scientific American ↗ · Dec 31

Boris Sakschewski Lead author, Potsdam Institute scientistKatherine Richardson Earth systems scientist, University of CopenhagenPlanetary Boundaries Science Lab, Potsdam Institute for Climate Impact Research Research organization

Planetary Boundaries Report: 7 of 9 'livability limits' now breached
scientificamerican.com

How it unfolded 1 development · click the chart to see its coverage articlesposts

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Sep 22yesterdaynow · 12:58 AM ET
  1. 1

    2026 Planetary Health Check released; seven boundaries at worst levels on record

    The Potsdam Institute releases its annual Planetary Health Check, showing that all seven already-breached boundaries have reached their worst recorded values since the framework's creation. Carbon dioxide concentrations hit 426 ppm—far above the preindustrial baseline of 280 ppm and the 350 ppm safety threshold scientists consider safe.

    “The diagnosis is unambiguous. Pressure is rising across every Planetary Boundary already outside the safe operating space. It means that the risk of large-scale, persistent and potentially irreversible change is increasing, while our margin for error in tackling these problems is shrinking.”
    — Boris Sakschewski
  2. background

    Ocean acidification crosses seventh boundary — A seventh boundary—ocean acidification—is breached, adding to the growing list of planetary limits exceeded by human activity.

  3. background

    First Planetary Health Check finds six boundaries breached — The inaugural annual Planetary Health Check reveals that human actions—from fossil fuel burning to excess fertilizer use—have pushed Earth past six of the nine boundaries.

  4. background

    Scientists conceive the nine Planetary Boundaries framework — Researchers at the Potsdam Institute for Climate Impact Research develop a set of nine chemical and physical boundaries as a planetary life-support system—measures crucial to maintaining the environment humans and other species have adapted to.