New Delhi, Dec. 1 -- The Supreme Court on Monday suggested that the Centre and concerned authorities revisit their action plan for reducing air-pollution levels in Delhi and the National Capital Region (NCR) to see whether it has brought any effective changes.

"Why don't you revisit your action plan to see for yourself whether you have brought any effective changes? And if you have, then are they less than what is needed? We think it's important to evaluate whether any of your action plans have proved to be effective, ineffective, or less effective. Despite your hesitance or confidence about whether you would be able to achieve effective change, is it not right to revisit the action plan? Evaluate the steps you have taken so far," CJI Ka...