🌎 Get our exclusive NordVPN deal here ➡️ https://NordVPN.com/sabine It's risk-free with Nord's 30-day money-back guarantee! Correction to what I say at 7 mins 13: The major reason air pressure decreases is that the gravitational pressure from the air above it decreases. The gravitational force itself also decreases but that's a rather minor contribution. Sorry about that, a rather stupid brain-fart. How does the greenhouse effect work? Greenhouse gases, such as carbon dioxide and methane, prevent infrared radiation from escaping to outer space. This warms the surface of earth. More greenhouse gas means more warming. Simple enough! Alas, if you look at the numbers, it turns out that most infrared radiation is absorbed almost immediately above the ground already at pre-industrial greenhouse gas levels. So how does it really work? In this video, I try to sort it out. 👉 Transcript and References on Patreon ➜ https://www.patreon.com/Sabine 💌 Sign up for my weekly science newsletter. It's free! ➜ https://sabinehossenfelder.com/newsletter/ 📖 Check out my new book "Existential Physics" ➜ http://existentialphysics.com/ 🔗 Join this channel to get access to perks ➜ null 00:00 Intro 00:40 The Greenhouse Effect: Middle School Version 03:17 The Greenhouse Effect: High School Version 10:33 The Greenhouse Effect: PhD Version 14:30 Stratospheric Cooling 16:24 Summary 18:14 Protect Your Privacy With NordVPN #science #climate