An audit released by the Office of Inspector General Wednesday reveals that under the Obama administration, the  Environmental Protection Agency wasted a whopping $690,000 on subsidized parking for employees at its Washington, D.C., headquarters. What’s worse? No one parked in the expensive spaces.

“Only EPA headquarters (based in Washington, D.C.) and Region 4 (based in Atlanta, Georgia) subsidized employee parking,” the inspector general said.

“These offices paid over $840,000 to subsidize employee parking from January 1, 2015, through December 31, 2016. In this time period, none of the other EPA regional offices provided their employees with subsidized parking, which is not a required employee benefit.”

This means that a substantial chunk of EPA resources went toward unnecessary parking benefits that could have gone toward environmental projects. The audit revealed that the agency paid $293.45 per month for parking spots that were not being used.

“More than a quarter of the parking spots the EPA paid for its D.C. headquarters were unoccupied,” according to a report in The Washington Free Beacon.

“We also found that, from January 2015 through December 2016, 29 percent of the parking spaces that headquarters leased for its employees and 27 percent of the parking spaces that Region 4 leased for its employees remained unoccupied,” the inspector general said. “The EPA paid approximately $690,000 for these unoccupied parking spaces.”

The inspector general said the $1.5 million spent on subsidized parking and unused parking spots could have been used for mission-critical work.

“While the parking subsidy is permitted, it is not required,” the inspector general said. “In an age of dwindling federal resources, the EPA’s use of taxpayer money—over $840,000 in a 2-year period—to fund employee parking may not be an effective use of federal resources and may take funds away from mission-critical public health and environmental initiatives.”

Under administrator Scott Pruitt, the EPA made plans to return 53 unused parking spaces earlier this year, which would save taxpayers $186,634.20 annually.