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Google announced a 20-year power purchase agreement with Constellation, the largest U.S. nuclear plant operator, to upgrade six nuclear power plant sites across the country. The deal represents more than $4.3 billion in new investment and is aimed at securing reliable, carbon-free electricity for Google's expanding, power-hungry data centers. The agreement reflects a broader trend of major tech companies turning to nuclear energy to meet surging electricity demand driven by AI data center growth.