Governments lag on commitments under 2022 global biodiversity agreement
Talks in Yerevan seek to preserve the 2022 biodiversity agreement as governments lag on implementation.
Event / Environment
COP17 Biodiversity Conference
The 17th Conference of the Parties to the UN Convention on Biological Diversity takes place in Yerevan, Armenia, in October 2026. Delegates are negotiating measures to preserve the 2022 biodiversity agreement and its 2030 protection targets. On 22 October 2026, the IUCN presented its first global assessment of coral reefs at the conference, classifying 96% of reefs as Critically Endangered and citing climate-driven thermal stress as the main cause of decline.
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2026-10-22 to 2026-10-26 · UTC publication dates
Coverage begins 22 Oct, 19:55 UTC
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What happened
IUCN assessment uses IPCC intermediate scenario projecting 2.7°C warming by 2100
The IUCN assessment used the intermediate scenario of the Intergovernmental Panel on Climate Change (IPCC), which projects global temperatures rising 2.7°C above pre-industrial levels by 2100.
COP17 negotiations aim to preserve the 2022 global biodiversity agreement
Parties at COP17 are negotiating to preserve the 2022 global biodiversity agreement, which aims to protect 30% of the world's land and seas by 2030.
Governments are slow to implement commitments under the 2022 biodiversity agreement
Governments have been slow to implement their commitments under the 2022 global biodiversity agreement, and its 2030 objectives are becoming increasingly difficult to achieve.
IUCN assessment covers 127 tropical and subtropical reef ecosystems over 188,362 km2
The IUCN analysis covered 127 tropical and subtropical coral reef ecosystems with a combined area of 188,362 square kilometres.
Nature study finds nearly half of coral species at high relative extinction risk in 2020
A study published in the journal Nature the previous week found that in 2020, nearly half of coral species had a high relative risk of extinction, with climate change as the main driver of this decline.
96% of coral reefs assessed as Critically Endangered in IUCN's first global reef assessment
The International Union for Conservation of Nature (IUCN) classified 96% of coral reefs, spread across more than 80 countries and territories, as Critically Endangered, the highest threat category in its Red List framework. The assessment is the first global evaluation of this type.
COP17 biodiversity conference takes place in Yerevan, Armenia
Governments are gathered in Yerevan, Armenia, for the COP17 biodiversity conference, where the coral reef findings were presented.
A strong 'super' El Niño emerged in 2026, posing an added risk to corals
A strong 'super' El Niño, a natural warming of ocean waters, appeared in 2026 and represents an additional risk to coral reefs.
Climate-driven thermal stress identified as the most persistent cause of global reef decline
The IUCN assessment identifies thermal stress from climate change as the most consistent cause of the global decline of coral reefs. Pollution, overfishing and overtourism also degrade reef health.
Current national emissions commitments place the world on track for 2.6°C warming this century
Current national commitments to reduce greenhouse gas emissions put the world on track for approximately 2.6°C of global warming this century.
Nearly all shallow-water coral reefs face extremely high risk of disappearance by 2075
The IUCN assessed that nearly all shallow-water coral reefs worldwide face an 'extremely high risk' of disappearance by 2075 due to climate change.
Coral reefs support about a quarter of all marine species
Coral reefs are rich ecosystems that host about one quarter of all marine species. They are sensitive to heat, and rising ocean temperatures increase the frequency and intensity of bleaching events.
Great Barrier Reef, Coral Triangle, Mesoamerican Reef and Red Sea reefs among most threatened
The IUCN identified the Great Barrier Reef in Australia, the Coral Triangle in the western Pacific and Southeast Asia, the Mesoamerican Reef in the Caribbean, and the reefs of the Red Sea as among the most threatened reef systems.
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IUCN reef assessment rates 96% of coral reefs Critically Endangered
IUCN's first global reef assessment rates 96% of coral reefs Critically Endangered, citing climate-driven thermal stress.