It’s official: 2024 was the hottest year on record, breaking the previous record set in 2023 and pushing the world over a critical climate threshold, according to new data from Europe’s climate monitoring agency Copernicus.
Last year was 1.6 degrees hotter than the period before humans began burning large amounts of fossil fuels, Copernicus found. It makes 2024 the first calendar year to breach the 1.5-degree limit countries agreed to avoid under the Paris climate agreement in 2015.
Scientists are much more concerned about breaches over decades, rather than single years — as above that threshold humans and ecosystems may struggle to adapt — but 2024’s record “does mean we’re getting dangerously close,” said Joeri Rogelj, a climate professor at Imperial College London.
The Copernicus analysis points to a slew of climate records falling last year: The planet endured its hottest day on record in July; each month from January to June was the warmest such month on record; and levels of planet-heating pollution reached unprecedented highs.
