Microsoft is one of the biggest spenders, followed closely by Google and AWS, Bloomberg Intelligence said. Its estimate of Microsoft’s capital spending on AI, at $62.4 billion for calendar 2025, is lower than Smith’s claim that the company will invest $80 billion in the fiscal year to June 30, 2025.

Microsoft says it plans to spend $80 billion on building AI data centers in the 2025 financial year, a significant increase on last year.

Many companies and brands have begun shifting to more sustainable practices in recent years. Microsoft has long been leading the charge, pledging to be carbon negative by 2030. And it's now added another tactic in the fight for sustainability: building data centers made of wood and other low-carbon materials.