Biodiversity loss, fertilizer use, climate change and land use have all exceeded Earth-System limits
Human activity over the past century and a half has pushed the Earth into critical mode, say scientists. New research published in Science finds four out of nine 'planetary boundaries' have now been crossed. Biodiversity loss, fertiliser use, climate change and land use have all exceeded the point at which the risk of sliding into a "much less hospitable" world becomes high.
Passing any one of the nine critical boundaries risks disrupting the complex and delicate interactions that exist on Earth between the land, ocean, atmosphere, ice sheets and people, says the team of 18 researchers.
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