Climate · Geneva, Switzerland · October 27, 2026

Greenhouse gases hit record highs in 2025

Reported by 8 outlets · first reported Oct 27, 8:00 AM ET

The WMO says CO2 averaged 426.8 parts per million in 2025. A Lancet study urges declaring climate change a health emergency.

Why it matters

Higher levels lock in warming for centuries.

Background

WMO reports annually on gases.

The story so far

1. Oct 21UN warns El Niño could be strongest on record
2. Oct 22WMO says El Niño could be strongest on record
3. Oct 27Greenhouse gases hit record highs in 2025
4. Oct 28WMO: greenhouse gases hit record highs in 2025

Follow the whole story →

Sources

• AFP via France 24 via Wikipedia ↗October 27, 2026
• UN News ↗Oct 27, 8:00 AM ET
• UPI ↗Oct 27, 12:54 PM ET

This summary was written automatically from the reporting linked above; follow the sources for the full story. How One Turn works.

See it on the globe →All of Oct 27's stories