Fusion fuels: Overview
Seawater and lithium: the fuels of a star on Earth
What this tile covers Light atoms that release energy when joined: deuterium from seawater, lithium, helium-3. Share of use 0% share of world energy supply (2024)Share of world total energy supply, 2024 (latest year where noted). Denominator is the Energy Institute Statistical Review 2025 total of 592.2 EJ (physical energy content method). Flows EI omits (traditional biomass via WBA, solar and geothermal heat, food energy) are set against the same 592.2 EJ, so shares sum to slightly more than 100%. No fusion plant yet delivers net energy, so fusion fuels supply nothing. Source: The global fusion industry in 2025, Fusion Industry Association.
Key facts
| Origin | Nuclear |
| Renewable | Effectively limitless if practical |
Included from the reference tables
- Fusion
- Fusion fuels
Linked to the material world
Li LithiumAlso in Earth, gravity and atoms
Td TidesGeo Earth's heatU UraniumnH2 Natural hydrogenExplore paths from here
More on this tile in the tabs above: how energy resides, abundance, fluctuation in time, across the earth, impact on nature.