New Delhi, Nov 7 (IANS): The Supreme Court will hear on Tuesday a plea on the alarming state of air pollution in Delhi as it was told that it had, in the past, issued several directions but their effective implementation and enforcement was lacking.

A bench of Chief Justice T.S. Thakur, Justice D.Y. Chandrachud and Justice L. Nageswara Rao agreed to hear the matter on Tuesday after Sunita Narayan of Centre for Science and Environment told the court that there was no effective implementation of the directions issued by the apex court last year.

She told the court that as of now the direction issued in the past were sufficient but if the need arose they would urge the court to issue further directions.

She sought from the court monitoring of the implementation of its directions.

The apex court was also given the report by the Environment Pollution (Prevention and Control) Authority for NCR on the state of air pollution in the national capital territory.

Narayan also told the court that Uttar Pradesh and Haryana were diverting the heavy vehicles and other traffic so that they don't pass through the national capital but because of shortage of manpower the diversion of traffic was not upto the desired levels.