Microsoft data center expansion puts key clean power goal at risk
Microsoft’s AI data-center buildout collided with a 2030 pledge to match every hour of power use with clean energy.
Microsoft was weighing whether to delay or abandon one of its hardest climate promises as it accelerated the buildout of energy-hungry data centers for artificial intelligence. The company had set a 2030 target to match 100% of its hourly electricity use with renewable energy purchases, a stricter standard than its earlier 2025 goal of matching annual electricity consumption, which it said it had already met.
The strain was visible in Microsoft’s own numbers. The company said this year that it was investing $80 billion in AI-enabled datacenters around the world, while its sustainability report showed total emissions had risen 23.4% since its 2020 baseline, driven by AI and cloud expansion. Over the same span, energy use climbed 168%. Microsoft’s reporting also said 97% of its emissions fell in Scope 3, largely in the supply chain, where steel, concrete and other building materials for datacenters remain difficult to clean up quickly.
Microsoft has spent years trying to build a cleaner supply for that growth. Since 2020, it said it had contracted 40 gigawatts of new renewable energy across 26 countries, with 19 gigawatts already online, enough to power about 10 million U.S. homes. In February, Microsoft said it had reached its 2025 renewable-energy milestone, but that achievement covered annual consumption, not the more exacting hour-by-hour matching demanded by the 2030 pledge.
The company has also turned to nuclear and large-scale power deals to keep pace. In 2024 it signed an agreement with Constellation Energy to help restart an 835-megawatt unit at Three Mile Island in Pennsylvania, and it later announced a five-year global deal with Brookfield Renewable Partners that could bring more than 10.5 gigawatts of new renewable capacity online in the United States and Europe. Those bets showed the trade-off now facing Microsoft and the wider AI industry: faster data-center growth has made the clean-power math harder, not easier.
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