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\n ADVERTISEMENT<\/p>\n
\n By Liam Gilliver\n<\/p>\n
\n Published on
\n 24\/09\/2025 – 18:05 GMT+2\n <\/p>\n
\n ADVERTISEMENT<\/p>\n
Humans are pushing the planet \u201cbeyond the limits of a safe operating space\u201d as yet another critical Earth system boundary has been breached.\u00a0<\/p>\n
A damning new report reveals the planet\u2019s ocean acidification<\/a> –\u00a0 where the water\u2019s pH is lowered due to CO\u2082 absorption – has entered the danger zone for the first time ever.<\/p>\n The 2025 Planetary Health Check<\/a>, published by the Planetary Boundaries Science Lab at the Potsdam Institute for Climate Impact Research (PIK), warns that seven of the nine critical Earth system boundaries have now been breached, one more than last year.\u00a0<\/p>\n The institution blames the \u201cstark new development\u201d on fossil fuel burning, deforestation and land-use change, arguing the trifecta is degrading the ocean\u2019s ability to \u201cact as Earth\u2019s stabiliser”.\u00a0<\/p>\n Why are the oceans so important?<\/p>\n \u201cThe ocean is becoming more acidic, oxygen levels are dropping and marine heatwaves are increasing,\u201d says Levke Caesar, co-lead of Planetary Boundaries Science Lab, and one of the authors of the report.\u00a0<\/p>\n \u201cThis is ramping up pressure on a system vital to stabilise conditions on planet Earth. This intensifying acidification stems primarily from fossil fuel emissions, and together with warming and deoxygenation affects everything from coastal fisheries to the open ocean.\u201d<\/p>\n Caesar adds that the consequences of the ocean\u2019s acidification will \u201cripple outward\u201d, impacting issues including food insecurity<\/a>, global climate stability and human wellbeing.<\/p>\n Since the start of the industrial era, the pH of the ocean\u2019s surface has dropped by around 0.1 units, a 30 to 40 per cent spike in acidity. This has already resulted in pteropods (tiny sea snails) showing signs of shell damage.<\/p>\n While this may not seem significant, they\u2019re a crucial food source for many species, and experts say their decline can impact entire food chains.<\/p>\n \u201cThe ocean is our planet\u2019s life-support system,\u201d says Dr Sylvia Earle, a renowned oceanographer and Planetary Guardian. \u201cWithout healthy seas, there is no healthy planet.\u00a0<\/p>\n \u201cFor billions of years, the ocean has been Earth\u2019s great stabiliser: generating oxygen, shaping climate, and supporting the diversity of life. Today, acidification is a flashing red warning light on the dashboard of Earth\u2019s stability. Ignore it, and we risk collapsing the very foundation of our living world. Protect the ocean, and we protect ourselves.\u201d<\/p>\n Planetary Boundaries: What are they and which have been breached?<\/p>\n Planetary Boundaries Science launched in 2023 to address critical gaps in our understanding and monitoring of the Earth\u2019s system. It coined nine boundaries<\/a> that must remain within safe limits to \u201ckeep humanity safe and the natural world resilient\u201d.\u00a0\u00a0<\/p>\n Scientists monitor these boundaries – similar to a health check at the doctor\u2019s – to track the planet\u2019s condition. <\/p>\n They include: Climate Change (a long-term shift in Earth\u2019s temperature and weather patterns), Biosphere Integrity (the overall health, functioning and resilience of Earth\u2019s living systems), Land System Change (from human-driven activities such as agriculture), Freshwater Use, Biogeochemical Flows, Novel Entities (like synthetic chemicals or microplastics<\/a>), Ocean Acidification, Ozone Depletion (thinning of the Earth\u2019s protective layer) and Aerosol Loading (air pollution). <\/p>\n Following the latest report, only two boundaries remain within safe boundaries: loading of aerosols and the stratospheric ozone layer.<\/p>\n \u201cWe are witnessing widespread decline in the health of our planet. But this is not an inevitable outcome,\u201d states Johan Rockstr\u00f6m, director of the Potsdam Institute for Climate Impact Research.<\/p>\n \u201cThe drop in aerosol pollution and healing of the ozone layer show that it is possible to turn the direction of global development. Even if the diagnosis is dire, the window of cure is still open. Failure is not inevitable; failure is a choice. A choice that must and can be avoided.\u201d<\/p>\n","protected":false},"excerpt":{"rendered":"By Liam Gilliver Published on 24\/09\/2025 – 18:05 GMT+2 ADVERTISEMENT Humans are pushing the planet \u201cbeyond the limits of…\n","protected":false},"author":2,"featured_media":179198,"comment_status":"","ping_status":"","sticky":false,"template":"","format":"standard","meta":{"footnotes":""},"categories":[22],"tags":[64,63,68,75,8666,89180,115506,48463,128,4719],"class_list":{"0":"post-179197","1":"post","2":"type-post","3":"status-publish","4":"format-standard","5":"has-post-thumbnail","7":"category-environment","8":"tag-au","9":"tag-australia","10":"tag-climate-change","11":"tag-environment","12":"tag-fossil-fuels","13":"tag-marine-pollution","14":"tag-oceanic-acidity","15":"tag-planet-earth","16":"tag-science","17":"tag-sea"},"_links":{"self":[{"href":"https:\/\/www.newsbeep.com\/au\/wp-json\/wp\/v2\/posts\/179197","targetHints":{"allow":["GET"]}}],"collection":[{"href":"https:\/\/www.newsbeep.com\/au\/wp-json\/wp\/v2\/posts"}],"about":[{"href":"https:\/\/www.newsbeep.com\/au\/wp-json\/wp\/v2\/types\/post"}],"author":[{"embeddable":true,"href":"https:\/\/www.newsbeep.com\/au\/wp-json\/wp\/v2\/users\/2"}],"replies":[{"embeddable":true,"href":"https:\/\/www.newsbeep.com\/au\/wp-json\/wp\/v2\/comments?post=179197"}],"version-history":[{"count":0,"href":"https:\/\/www.newsbeep.com\/au\/wp-json\/wp\/v2\/posts\/179197\/revisions"}],"wp:featuredmedia":[{"embeddable":true,"href":"https:\/\/www.newsbeep.com\/au\/wp-json\/wp\/v2\/media\/179198"}],"wp:attachment":[{"href":"https:\/\/www.newsbeep.com\/au\/wp-json\/wp\/v2\/media?parent=179197"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/www.newsbeep.com\/au\/wp-json\/wp\/v2\/categories?post=179197"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/www.newsbeep.com\/au\/wp-json\/wp\/v2\/tags?post=179197"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}