Having now conclusively proven that global warming is very real, and getting worse with each passing decade, we can now say we have reached the first breach of a global climate tipping point: the end of warm water coral reefs on Earth.
Here are the global climate tipping points:
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And here is the bad news:
It's official: we no longer live on a planet with temperatures that can sustain warm-water coral reefs.
www.sciencealert.com
It's official: we no longer live on a planet with temperatures that can sustain warm-water coral reefs.
This is the first of many fragile Earth systems set to topple as human activities continue to stoke
our planet's fever, the 2025 Global Tipping Points Report warns.
Mass reef dieback occurs at an estimated 1.2 °C warming above preindustrial averages, a point the report – involving 160 scientists across 23 countries – confirms we're well beyond.
"I recognize that engaging with tipping points and talking about these risks is emotionally challenging," University of Oslo sociologist Manjana Milkoreit, who contributed to the report, told ScienceAlert. "Maybe the most important but also most difficult thing anybody can do is not to turn away and ignore this problem."
Earth's most vibrant underwater gardens, from the
Great Barrier Reef in Australia to Florida's
Sombrero Reef, are being annihilated by human-caused global warming.
Four global coral bleaching events have now been recorded, with two of these occurring in the last decade. In this time, the Great Barrier Reef alone bleached in 2016, 2017, 2020, 2022, 2024, and 2025.
“Current policies are going to likely result in 2.5 – 3 °C warming later this century, risking crossing many irreversible climate tipping points," says Lenton, explaining the next Earth system 'domino' set to topple could be the collapse of part of the
West Antarctic ice sheet or the Greenland ice sheet.
"These would accelerate sea level rise in the short term and commit us to multiple meters of sea level rise in the long term."
The report points out that corals are merely the canary in a coal mine. With each fraction of a degree of increased warming, more of Earth's life-sustaining systems will be pushed to the point where they collapse.
"This grim situation must be a wake-up call that, unless we act decisively now, we will also lose the
Amazon rainforest, the
ice sheets and
vital ocean currents,"
explains WWF-UK chief scientist Mike Barrett. "In that scenario, we would be looking at a truly catastrophic outcome for all humanity."
While there is still
uncertainty about the upper limits (the point of no return) of these tipping points, these details do not change the fact that
people are already dying as a consequence of climate change, nor do they redirect the actions we can still take to save countless future lives.
View: https://www.youtube.com/watch?v=c2DBAtOIhqI
View: https://www.youtube.com/watch?v=v5rz1LnCsp8
Policy Briefs and Reports Tipping Points Briefing Papers Download the Tipping Points Policy Brief here. Download A positive tipping cascade in power, transport and heating Download the study here. Download Planetary Solvency To find out more about the risks posed by Earth system tipping points...
global-tipping-points.org