More than 70 scientists from nearly 30 countries have warned that overshooting 1.5°C of warming carries rapidly escalating risks of irreversible harm. The report, titled 10 New Insights in Climate Science, comes from Future Earth, The Earth League and the World Climate Research Programme. It found that the economic and social costs of overshoot are higher than previous estimates suggested.
Global sea surface temperatures hit a record 21.1°C in August, the report found. Ocean acidification has entered what the scientists call a danger zone. Some sea-level rise is already irreversible. Its final magnitude will still depend on how quickly the world cuts emissions from here. Continental drying is accelerating too. The United Nations expects one in two people to face severe water shortages by 2030.
“1.5°C is a limit that we cross at our own risk,” said Johan Rockström of the Potsdam Institute. He co-chairs the Earth League and sits on the report’s editorial board. Wendy Broadgate, director of the Future Earth Global Hub, described the ocean’s changing role bluntly. “The ocean has been our planet’s shock absorber,” she said. She pointed to signs that its capacity to keep absorbing heat and carbon is not limitless.
Food systems are a major emitter
The report puts food and agriculture at roughly one-third of global greenhouse gas emissions, second only to burning fossil fuels. Meat production is identified as the main driver within that share. In European Union food production specifically, animal-sourced foods account for 81 to 86% of emissions. Yet they supply only about 32% of calories and 64% of protein consumed.
Plant-rich diets could deliver climate, biodiversity and health benefits together, the report argues, provided the shift happens carefully and fairly rather than abruptly. The social cost of carbon may be up to four times higher than earlier estimates, the scientists found. That revision would strengthen the economic case for faster emissions cuts across every sector, agriculture included.
Climate finance and justice run through the findings
Carbon border taxes inside emerging “climate clubs” could cut emissions, the report says, but may penalise developing countries unless wealthier nations provide support alongside them. That tension sits close to concerns raised this week by small island states. Tuvalu’s leaders have told COP31 that climate finance must not push vulnerable nations deeper into debt, a demand that lines up closely with the report’s own warning about unequal burden-sharing.
The scientists also flagged a newer problem: lobbying efforts increasingly rely on greenwashing and disinformation, not outright denial of climate change itself. Wars and energy security concerns are making the shift away from fossil fuels more unequal in the meantime, the report found, with the most vulnerable populations bearing the brunt of energy price spikes triggered by conflict elsewhere.
The report’s authors stop short of saying 1.5°C is already lost. They frame the coming years as the period when the difference between a survivable overshoot and a far more damaging one gets decided, largely through decisions on emissions, finance and food systems taken well before 2030 arrives.
