In a first-of-its-kind agreement, Google will purchase electricity from a nuclear fusion power plant. But the technology remains years from commercial scale.

Google has agreed to purchase power from a planned fusion power plant in the 2030s in only the second electricity offtake deal to be signed in the nascent fusion energy sector.

Google is making a big bet on a power source that hasn’t yet been used successfully anywhere in the world: nuclear fusion. The tech company said on Monday that it will buy power from a planned nuclear fusion plant in Virginia developed by Commonwealth Fusion Systems,