COPENHAGEN, October 13, 2025 - Global warming is surpassing critical limits faster than anticipated, with coral reefs worldwide facing a near-irreversible decline, signaling the first major climate-driven ecosystem collapse, according to scientists. This alert comes from the Global Tipping Points report, compiled by 160 researchers globally, which evaluates critical thresholds for environmental systems. The findings arrive just weeks before the COP30 climate summit, set to take place near the Amazon rainforest in Brazil.

The Amazon itself is at risk, with the report indicating that deforestation could trigger its collapse if global temperatures rise beyond 1.5 degrees Celsius, a lower threshold than previously estimated. Another concern is the potential disruption of the Atlantic Meridional Overturning Circulation (AMOC), a vital ocean current that supports mild winters in northern Europe.

"Changes are happening rapidly in parts of the climate and ecosystems," said Tim Lenton, an environmental scientist at the University of Exeter and lead author of the report. Despite the alarming trends, Lenton highlighted positive developments, such as renewable energy surpassing coal in electricity generation this year, according to Ember, a nonprofit think tank.

"We have the power to act," Lenton emphasized, urging global cooperation to reduce carbon emissions at the upcoming COP30 summit in November.

The pace of environmental changes has caught scientists off guard. Global temperatures have already risen by 1.3 to 1.4 degrees Celsius (2.3 to 2.5 degrees Fahrenheit) above preindustrial levels, based on data from U.N. and EU science agencies. The past two years were the warmest on record, with marine heatwaves causing bleaching in 84% of global coral reefs, threatening their survival. Coral reefs support roughly a quarter of all marine life, making their decline a significant concern for ocean ecosystems.

To enable coral recovery, global temperatures would need to drop back to 1 degree Celsius above preindustrial levels, a goal requiring urgent and substantial climate action. "The report highlights the growing scale and impact of climate change each year," said Pep Canadell, a senior scientist at Australia's CSIRO Climate Science Centre.

Current global policies put the world on track for approximately 3.1 degrees Celsius of warming by the end of the century, underscoring the need for immediate action.

Source: gcaptain.com, by Alison Withers