Turkish President Recep Tayyip Erdogan vetoed a law Monday that would have delayed the installation of filters on thermal power plants, according to the spokesman for the country’s ruling party.

“Our president did not find the regulation appropriate and vetoed it,” Omer Celik, spokesman for the Justice and Development (AK) Party, told a news conference during a meeting of the party’s central executive committee in the capital, Ankara.

He said an item of an omnibus law approved by parliament on Nov. 21 postponed the obligation to install filters on 15 thermal power plants that cause air pollution for 2.5

Read more: Erdogan vetoes law due to environmental concerns