What If Every Tree on Earth Disappeared?

In one second, all three trillion trees on Earth vanish. Surprisingly, you can still breathe. What breaks is everything else: the shade, the rain, the coffee, the medicine and the climate. We follow a world without trees step by step, from the first silent second to ten years later: the oldest and tallest trees, the animals left homeless, the heat, a breakfast that falls apart, medicines that came from bark, floods, the Amazon's flying rivers, the things we can no longer build, a country that really lost its forests, and the one number that scared us most. What would you miss first? Tell us in the comments. 0:00 Every tree on Earth disappears 0:41 Second 1: the silence 2:19 Hour 1: the heat 3:17 Day 1: the breakfast test 4:07 Week 1: the medicine cabinet 5:12 Month 1: the first storm 6:13 Year 1: the rain stops 7:21 What we cannot build 8:23 It already happened: Iceland, Rapa Nui, the Dust Bowl 9:38 10 years: the carbon 10:55 The real lesson Sources: Crowther et al. 2015, Nature (3 trillion trees); FAO Global Forest Resources Assessment 2020 and State of the World's Forests 2020; US Forest Service (bristlecone pines, Prairie States Forestry Project); National Park Service (Hyperion); US EPA (urban heat islands); Nobre 2014 and Arraut et al. 2012 (Amazon flying rivers); NAHB / US Census Survey of Construction; International Rubber Study Group; Icelandic Forest Service; Hunt & Lipo 2006 and Rull 2020 (Rapa Nui); IPCC AR6 and Global Carbon Project; NOAA Ocean Service (ocean oxygen); National Cancer Institute (paclitaxel); WHO (quinine); UNCCD (Great Green Wall). The carbon and oxygen comparisons are our own simple calculations. Footage and photos: NASA, NOAA, USDA, BLM, U.S. government and Wikimedia Commons, public domain and CC0 only; graphics by Hour Zero. AI disclosure: the narration is AI-assisted.