Just out, a 66 million year history of atmospheric CO2. Key take away: CO2 hasn't been at today's levels for at least 3 million years. These high CO2 worlds in the geological past had less ice and *much* higher sea levels 📈🌊 ⚒️🧪 www.science.org/doi/10.1126/...

A tour de force. Will dig into in next few days. What's going on between PETM & EECO?

Fewer humans then too (that's 1 point the deniers forget, as well as the rapid change in climate values). I saw a graph recently of how fossil use is increasing, not declining. Human beings are running out of time to keep things as good as we could have them, like ~1.5C or better. 🤦🤦🤦

We now have a (shrinking) window of time to get CO2 back down before our climate equilibrates: if CO2 stays at >420 ppm, the geological record says that sea levels rise by 5-25 m. This is why progress on phasing out fossil fuels at #COP28t.co/WXh0VtBQqu