Start from what is known, change one assumption, and watch what it implies for the planet. Every number here is labelled, so a guess can never pass for a fact.
Data centres used about 415 TWh in 2024 — around 1.5% of the world’s electricity. The IEA’s base case has that growing around 15% a year to 2030. What if growth is faster, slower, or lasts longer?
More than 17 million electric cars were sold in 2024, more than one in five new cars. If EV sales keep growing faster than the car market, when do they equal it?
About $2.2 trillion went into clean-energy technologies in 2025 — twice the amount going to oil, gas and coal. Add it up over a generation.
People × how many adopt × what each spends a year. Then grow it, set it against the whole world economy, and see how sensitive it is to your two biggest guesses.
Add up world output year after year, from 2026. The world produced about $118 trillion in 2025 Fact. Set the growth, and see when the running total passes $1,000 trillion.
No. A scenario is what follows if your assumptions hold. The sensitivity ranges show how quickly the answer moves when they don’t. Nobody knows these futures — including the organisations whose baseline figures we use.
Each fact card names its source and date: the IEA (energy, AI electricity, electric cars), the IMF (world GDP) and the UN (population). Where a figure is itself an estimate by that organisation, the card says so.
TrillionEuro is for building things: a scale ladder and unit economics for one idea. QuadrillionEuro is for thinking about the whole planet: technologies and markets at a size where they change energy systems and economies.
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