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\ud83c\udf0e Get our exclusive NordVPN deal here \u27a1\ufe0f https://NordVPN.com/sabine It's risk-free with Nord's 30-day money-back guarantee! Replacing fossil fuel with hydrogen seems like an ideal solution to make transportation environmentally friendly and to provide a backup for intermittent energy sources like solar and wind. But how environmentally friendly is hydrogen really? And how sustainable is it, given that hydrogen fuel cells rely on supply of rare metals like platinum and iridium? In this video, we have collected all the relevant numbers for you. The full "Under Pressure" performance is here: https://www.youtube.com/watch?v=OVzvoPP6M50 \ud83d\uddbc\ufe0f On instagram \u279c https://www.instagram.com/sciencewtg/ \ud83d\udc49 Transcript and References on Patreon \u279c https://www.patreon.com/Sabine \ud83d\udc8c Sign up for my weekly science newsletter. It's free! \u279c https://sabinehossenfelder.com/newsletter/ \ud83d\udcd6 Check out my new book "Existential Physics" \u279c http://existentialphysics.com/ \ud83d\udd17 Join this channel to get access to perks \u279c https://www.youtube.com/channel/UC1yNl2E66ZzKApQdRuTQ4tw/join Many thanks to Jordi Busqué for helping with this video http://jordibusque.com/ 00:00 Intro 00:49 Hydrogen Basics 03:39 The Hydrogen Market 06:04 The Colours Of Hydrogen 12:11 Water Supply 13:34 The Cold Start Problem 14:05 Rare Metal Shortages 15:55 Hydrogen Embrittlement 16:45 Summary 18:16 Protect Your Privacy with NordVPN #science #technology #climate