Meta's plans to build a new AI data center near an unspecified nuclear power plant hit a roadblock after rare pollinators were discovered on the land.

Amazon has also faced a recent setback after the government on Monday rejected a request to increase the amount of power a nuclear plant can direct to one of its data centers. It’s still allowed to use 300 megawatts from the Susquehanna plant but initially sought 480 megawatts.

Environmental regulators reportedly quashed Mark Zuckerberg’s nuclear plant partnership meant to help power Meta’s ongoing artificial intelligence projects. Details remain scarce, but the main reason for pausing plans allegedly comes down to one issue— rare bees.