The Supreme Court on Thursday said it will not tolerate any laxity on the issue of smog tower project in the national capital and directed the Centre to file a detailed affidavit citing reasons for the delay in the project.

A bench comprising Justices Arun Mishra, B.R. Gavai and Krishna Murari shot a volley of questions at Centre's counsel, Solicitor General Tushar Mehta, in connection with the delay in the implementation of the project after days of work and school were affected here due to bad air quality last year.