The California Supreme Court ruled Thursday that the University of California, Berkeley, must cut its enrollment by close to 3,000 students in response to a lawsuit from local citizens over the environmental impact of planned academic buildings.

The court’s 4-2 ruling upheld a lower court ruling last month that ordered the university to freeze its enrollment at 2020 levels. The university will now have to withhold 5,000 acceptance letters it had planned to send out.