We've been told a terrifying story about climate change. We stand before two doors: behind one is environmental collapse, and behind the other is economic ruin from the drastic policies meant to stop it. It’s a classic "wicked problem" where every choice leads to disaster. But what if that story is wrong? What if there's a third door? In this talk, you'll discover why the choice between our planet and our prosperity is a false dilemma. The key isn't drastic, short-term sacrifice; it's the incredible, often-overlooked flexibility of our economy over the long run. Learn how a planned, 30-year transition to a climate-neutral world isn't a painful cost, but a cheap insurance policy for humanity. It's time to replace fear with a practical, optimistic, and achievable plan. Welcome to through the third door. John is Professor of Economics at the Institute for International Economic Studies at Stockholm University. He is known for his research is on public finance, social mobility, growth and climate change. He has worked as advisor to the Swedish Ministry of Finance and the European Economic Advisory Group. This talk was given at a TEDx event using the TED conference format but independently organized by a local community. Learn more at https://www.ted.com/tedx