Centre has summoned Delhi, Punjab, Uttar Pradesh and Haryana governments on 4th of next month over the ambient air quality in the national capital.<br/><br/>Environment Ministry today reviewed air quality status of Delhi due to rise in pollution especially during this Diwali and directed the neighbouring states to effectively enforce ban on stubble burning. <br/><br/>In a statement, the Ministry observed that open burning of solid waste in and around Delhi, vehicular emissions, dust by the roadside and around construction sites in the city and stubble burning of crop residue in neighbouring states are major contributors to pollution. <br/><br/>The problem has been accentuated due to relatively low wind speeds and lower temperatures, resulting in reduced dispersion of pollutants in the national capital.<br/><br/>The Central Pollution Control Board has directed Municipal local bodies in and around Delhi to take all possible measures to check open burning of solid waste. <br/><br/>All public road owning agencies in Delhi have been asked to ensure that roadsides are watered periodically to arrest re-suspension of dust in ambient air. <br/><br/>Besides, Delhi Police will keep a watch on traffic movement at busy intersections to minimize vehicular pollution.