Don’t panic: A field guide to the runaway greenhouse

This is a re-post from The Climate Brink by Andrew Dessler In a recent post on his Substack, Jim Hansen wrote about “runaway climates” on Earth, and I thought it would be useful to explain the physics of what this actually means and whether it’s something we need to worry about. A runaway greenhouse occurs when humans add enough carbon dioxide to the atmosphere to push it past a threshold beyond which warming becomes self-sustaining and unstoppable 1 . Venus is the canonical example of what that