International • • • 🌿 Progressive

Planta industrial con cinco chimeneas altas que emiten columnas de humo sobre colinas al atardecer, con el cielo nublado en tonos naranjas
Imagen generada para EPM

Record CO2 in 2025 will shape the climate for centuries

The UN weather agency reported CO2 at 426.8 parts per million in 2025, 153 per cent of the pre-industrial level, with the past 11 years the warmest on record…

--- The context --- The World Meteorological Organization, the UN weather agency, said on Tuesday that levels of carbon dioxide and other greenhouse gases, caused by burning fossil fuels, reached record highs in 2025, locking in more long-term global warming. --- The facts --- The bulletin puts the average global concentration of CO2 at 426.8 parts per million in 2025, or 153 per cent of the 1750 pre-industrial baseline. When first published in 2004, the annual average level was 377.5 parts per million, compared with nearly 427 parts per million today, and methane and nitrous oxide also hit a new peak in 2025. Growth rates of CO2 have tripled since the 1960s, accelerating from 0.8 parts per million per year to 2.4 parts per million per year from 2011 to 2020. The exceptional surge of 3.5 parts per million in 2023-2024 coincided with a strong El Niño, and the 2.8 parts per million increase from 2024-2025 was a substantial addition of carbon from fossil fuel burning. --- The positions --- Deputy Secretary-General Ko Barrett said in Geneva that every additional part per million matters because it traps additional heat and supercharges the ocean and the atmosphere. Heat waves, tropical cyclones and rainstorms are intensifying faster than historical baselines suggested, and she stressed that the past 11 years have been the warmest on record, with the trend set to continue. Senior scientific officer Oksana Tarasova linked the 2023-2024 surge to a strong El Niño that reduced biosphere efficiency through more drought, drier vegetation and more wildfires. She also expected a further increase in concentrations in 2026 because of fossil fuel burning and a powerful El Niño that will impact land carbon sinks, as happened in 2023-2024. --- What remains unknown --- The bulletin reports on gas that accumulates in the atmosphere and not on new annual emissions. About half of the CO2 emitted each year remains in the atmosphere and the rest is absorbed by land ecosystems and oceans, making those sinks a central unknown to monitor. --- Unanswered questions --- How much will concentrations rise in 2026 if the powerful El Niño the agency expects does develop? Can land ecosystems and oceans keep absorbing the share of CO2 they currently remove from the atmosphere? Will COP31, in Antalya, Türkiye, from 9 to 20 November, turn climate commitments into concrete action? --- EPM analysis --- The NOAA Annual Greenhouse Gas Index shows that from 1990 to 2025 the warming effect caused by greenhouse gases increased by 56 per cent, with CO2 accounting for about 81 per cent of that increase. The agency flagged two trace gases tied to electricity: SF6, with a lifetime of over 1,000 years and a warming potential of approximately 24,300 times that of CO2, and hydrogen, up 5.3 per cent between 2010 and 2024, whose leakage raises growing concern. 📌 EPM Take: In EPM's view, a record repeated year after year should no longer be read as an anomaly but as the accumulated measure of energy decisions whose consequences will last for decades and centuries. The very long lifetime of CO2 makes action a duty toward generations who took no part in those decisions, and the warnings on SF6 and hydrogen leakage show that even the transition needs rigorous monitoring so it does not create new problems while addressing warming.
📤 Share on Telegram

¿Te gustó este artículo? Recibe cobertura global en tu correo.

Suscríbete gratis / Subscribe free