Part 1 of 5 · freeIntroduction
For a long time humanity changed its energy source by choice, for efficiency: from wood to coal, then from coal to oil. Today's energy transition is different: for the first time it is imposed by a question of survival, climate change.
This course explores how the world is trying to replace fossil fuels with cleaner sources, and why that shift is as hard as it is necessary.
The rest is in the Sophia app.The remaining parts, the open-book quiz and the full glossary. Free to start; Premium unlocks everything.
- 21.5°C: the target that drives everything
- 3The spectacular fall in prices
- 4The new obstacles: storage and rare metals
- 5Toward a new energy mix
Open-book quiz8 questions whose answers are in the text.
Glossary12 terms explained in a tap.
30 languagesThe same course, from French to Japanese.





