Documents show that one of Google’s new data centers would be powered by a natural gas plant that emits millions of tons of emissions each year—an increasingly common trend in the industry.

In a letter sent Thursday morning, Elizabeth Warren and Josh Hawley press the Energy Information Agency to mandate annual electricity disclosure for data centers.

The US senator said on Tuesday that a moratorium would give lawmakers time to "ensure that AI is safe." Alexandria Ocasio-Cortez will introduce a similar bill in the House in the weeks ahead.