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,

The site of the nation's most serious nuclear reactor accident could reopen by 2028 with Microsoft as its sole customer.

America's Three Mile Island nuclear energy plant, the site of a high-profile accident that discouraged nuclear power development in the US for decades, is preparing to reopen as Microsoft looks for ways to satisfy its growing energy needs.