🧵🧪🏆🥇We've done it! We've raised atmospheric CO₂ concentrations to the point where, for the first time in human history, they have exceeded 430 ppm every day for a full week. It had become fairly certain that we'd reach this landmark sometime this month, but even so it's a fairly sobering moment.
May 4, 2025 16:39It is also important to recognise that the rate at which the concentration is rising is faster than ever, at about 3 ppm/year. So, unless there are very rapid emission reductions, we can expect to pass 440 ppm by 2029 and 450 ppm by 2032.
Perhaps these numbers won't mean much to a lot of people, but without rapid emission reductions we will certainly, by any measure, have exceeded 1.5°C of warming by the early part of the 2030s. Many scientific studies indicate that this will have very serious global consequences.
