Atmospheric carbon dioxide (CO₂) rose faster in 2024 than in any year since records began. …Our new satellite analysis shows that the Amazon rainforest is struggling to keep up. And worryingly, the satellite that made this discovery could soon be switched off [due to proposed NASA budget cuts.]. Systematic measurements of CO₂ in the atmosphere began in the late 1950s. …Across six decades of measurements, CO₂ has gradually increased.  …The largest change was over the Amazon, where much less CO₂ is being absorbed. Similar slowdowns also appeared over southern Africa and southeast Asia, parts of Australia, the eastern US, Alaska and western Russia. Conversely, we detected more carbon being absorbed over western Europe, the US and central Canada. …It’s not yet clear whether 2023-24 is a short-term blip or an early sign of a long-term shift. But evidence points to an increasingly fragile situation, as tropical forests are stressed by hot and dry conditions.