Key Takeaways Constellation Energy will restart the Three Mile Island Unit 1 nuclear plant to provide electricity to power Microsoft's data centers.The 20-year deal is part of Microsoft's effort to reduce its carbon footprint,

Constellation described the agreement with Microsoft as the largest power purchase agreement that the nuclear plant operator has ever signed.

The Constellation Energy Corporation announced its plan to restart the Unit 1 nuclear reactor at Three Mile Island as part of a purchase agreement with Microsoft. Five years ago today, TMI shut down Unit 1,