Et nyt studie publiceret i tidsskriftet Science Advances konkluderer, at seks ud af de ni planetære grænser er overskredet, hvilket ifølge forskerne bringer menneskers livsvilkår i fare. Disse planetære grænser omfatter vigtige globale systemer – såsom klima, vand og biodiversitet – og når grænserne er overskredet kan systemerne ikke opretholde en bæredygtig planet. Foruden de seks grænser som er overskredet, vurderes to at være tæt på at blive brudt.
Kilde: Richardson et al. 2023, Science Advances
Fra rapporten:
”This planetary boundaries framework update finds that six of the nine boundaries are transgressed, suggesting that Earth is now well outside of the safe operating space for humanity. Ocean acidification is close to being breached, while aerosol loading regionally exceeds the boundary.”
”Stratospheric ozone levels have slightly recovered. The transgression level has increased for all boundaries earlier identified as overstepped. As primary production drives Earth system biosphere functions, human appropriation of net primary production is proposed as a control variable for functional biosphere integrity. This boundary is also transgressed. Earth system modeling of different levels of the transgression of the climate and land system change boundaries illustrates that these anthropogenic impacts on Earth system must be considered in a systemic context.”
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