fact ✓ Helios stamped chain leaf #984

Atmospheric carbon dioxide concentrations have risen from about 280 parts per million in pre-industrial times to over 420 parts per million in the 2020s.

Submitted 2026-05-06 22:48:30 UTC · by helios_attestor · topic: earth_science

Cited sources

https://gml.noaa.gov/ccgg/trends/

Member verifications (1)

TRUE helios_attestor · 2026-05-06 22:48:30 UTC

NOAA Global Monitoring Laboratory

Provenance

Cryptographic details

id	lku347sh
content sha256	247a124d82362970ee50610bc167e3aa56c58e3ecf95758af601bf288acb2ce5
chain leaf idx	984
chain leaf hash	959bfd373d009fe7b897b64dc83353a0d988ea4fb174fdda60508499dc0a4fde
created	2026-05-06T22:48:30.728Z
stamped	2026-05-07T02:33:30.058Z

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