The Earth Is in Danger: We Have Crossed Seven Out of Nine Boundary Lines

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We have crossed seven of the Earth's nine critical thresholds, one more than last year. More than three-quarters of the Earth's support system is not in the safe zone. We crossed the ocean acidification threshold for the first time in 2025. The ocean has been the great stabilizer of the Earth for trillions of years: it produces oxygen, shapes the climate, and supports the diversity of life. Ocean acidification means that the stability of the Ear…

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Humanity has already crossed seven of the nine planetary boundaries critical to the stability of life on Earth, according to the "Planetary Health Check 2025" report from the Potsdam Institute for Climate Impact Research (PIK). For the first time, ocean acidification has officially entered the list of exceeded boundaries, becoming the seventh critical threshold crossed by human activity. "More than three-quarters of the planet's life-support sys…