A seventh planetary boundary could soon be crossed because ocean acidification is increasing due to CO2 emissions. Even the current conditions are already dangerous „for many marine species“. This is according to the new „Planetary Health Check“ by the Potsdam Institute for Climate Impact Research (PIK), which was presented at the UN Future Summit on Monday to mark Climate Week. According to the report, the Earth system is even at „high risk“ in the areas of climate, biodiversity, pollutants/plastics and the nitrogen/phosphorus cycle.