Microsoft is weighing whether to delay or scale back one of its most ambitious clean energy goals as its rapid buildout of AI data centers puts pressure on its ability to meet those targets. Microsoft has yet to make any public announcements, but according to Bloomberg the company is having internal discussions over its hourly clean energy matching goal.

The tech company has said that by 2030 it intends to match 100% of its hourly energy use with clean power on the same grid. But Microsoft’s rush to build AI data centers has apparently sparked debate within the company about whether the pledge has become an impediment to its ambitions.

Microsoft declined to comment on the internal debate over the hourly matching goal. Instead, a spokesperson told TechCrunch the company continues “to look for opportunities to maintain our annual matching goal.”

Hourly targets like the kind Microsoft has set for itself are more rigorous than annual targets. Because the grid is a balanced system — the supply and demand of electrons needs to be matched on a near-instantaneous basis — hourly matching helps develop clean energy sources that more closely align with a company’s usage patterns.

Annual targets are more lenient. They are effectively accounting tricks that could, for example, let a company buy more solar power than it might use at midday. Other customers on the grid use that energy, but the company that paid for the solar panels gets to claim the renewable power they make. It’s a tidy arrangement that has sped the deployment of wind, solar, and batteries. But on its own, annual targets won’t eliminate fossil fuels entirely. Hourly targets help foster renewable development that more closely mimics how a true net-zero world would be powered.

Big tech companies like Microsoft, Meta, Google, and Apple have generally led on emissions reductions, setting aggressive net-zero targets. Many have eliminated their carbon emissions on an annual basis. Microsoft, for instance, said it met that goal last year.

But as data centers grow in size and number, those same companies are turning to natural gas. Microsoft is included in that list; last month, the company said it was working with Chevron and Engine No. 1 to build a massive natural gas power plant in West Texas that could eventually generate up to 5 gigawatts. 

Despite the West Texas project, Microsoft is widely viewed as a leader among tech companies pursuing net zero emissions. By 2030, Microsoft intends to remove more carbon from the atmosphere than its operations produce.

Part of the company’s renewable push has been driven by an internal carbon tax. The Microsoft spokesperson did not reply to questions about the company’s carbon tax. If it remains in place, some of the internal debate surrounding hourly matching might revolve around a cost-benefit analysis of the shift.

If Microsoft were to abandon its hourly-matching target, the company would also lose some leverage in efforts to sell the public on its on its data centers. 

As data centers have proliferated, the general public has begun to push back against them, citing concerns over pollution, power prices, and water use. When Microsoft brings its own clean power to a project, it can plausibly say it has addressed two of those concerns. Without it, new data centers might be harder to sell to the public.