New Delhi, Nov. 10 -- Expressing concern over the growing contribution of vehicle emissions to air pollution, the Supreme Court sought details from the four governments on measures being taken to monitor vehicle entry, enforce Pollution Under Control (PUC) certificate requirements and restrict overage or non-compliant vehicles.

The Court has called for stricter enforcement of vehicle emission standards and effective implementation of measures under the Graded Response Action Plan (GRAP) to address deteriorating air quality in Delhi-NCR.

Meanwhile, GRAP Stage III restrictions include a ban on certain construction activities, closure of stone crushers and restrictions on specified categories of older vehicles. The measures also provide fo...