Meta Platforms joined the RE100 clean energy initiative in 2016, but its data center plans complicate things.

Technology giant Meta has exited from a major clean energy pact it had been a signatory to for over a decade, after a natural gas-powered push for its data centers.

With Big Tech’s AI and data-center spending back under the microscope, Meta Platforms faces a prove-it moment when it reports earnings on July 29—investors want evidence that…