George Whitesides is a prime example of the kind of people we need in Washington.

Humanity is choosing to fail! We are doing virtually nothing to try and limit global warming to even 4°C. Let alone to 1.5°C. Methane concentrations are following the highest IPCC scenario, now at 1938 ppb.

The Trump-Supreme Court battle is not really the crisis. The crisis is here now. Trump is enacting an insidious coordinated attack on our institutions of democratic accountability, designed to crater democracy before next fall. 1/ A long 🧵to explain the plan & how we stop it.

Tonight my son alerted me that his TikTok feed has become a steady stream of Chinese propaganda videos. I had a look. It was: Clips of Xi Jinping giving speeches with inspirational music or stylized edits, Montages of Chinese technological achievements (e.g., AI, high-speed

Harvard University just released free online courses. No payment is required. Here are 12 courses you don't want to miss in 2024:

The Mauno Loa observatory showed the first weekly average CO₂ concentration of >430 ppm in about 3 million years!

The worst form of addiction that this country now faces is the greed of the oligarchy.

False hope will get hundreds of millions killed. The months most influenced by La Niña are still above 1.5°C. And we're about to reach a two-year average above +1.6°C. It baffles me that many still pretend that it's physically possible to keep global warming below 1.5°C

🚨🌍🌡📈 Using a 15-year trend, we have now officially passed 1.5°C of global warming. All recent La Niña months are above the trendline. Extrapolating this linear trend, we'll hit +1.75°C by 2031 and +2.0°C by 2037. ⬇️

During our Climate Chat, someone asked when we reach +3.0°C with current warming rates. Here I extrapolated the warming rate from 'Global Warming has Accelerated Significantly' by Grant Foster and Stefan @Rahmstorf (2025 preprint) to up to +4°C (extending their table 1):

CO₂ at Mauna Loa just reached a monthly average of >430 ppm for the first time. That's possibly higher than in over 3.3 million years. The global RATE of increase is off the chart. It's hard to exaggerate how unprecedented this is!

The Northern Hemisphere mid-latitudes are now in a permanent El Niño like state, as Makiko accurately called it. Regional anomalies change over time because of natural variability, but the trend will not go down much ever again. We'd better adapt as fast as possible