The Supreme Court has set a two-week time limit for the Centre to come up with a road-map to make river Ganga pollution free. It asked the government yesterday as to why urgent steps are not being taken to clean the river. A Bench headed by Justice T S Thakur said, the issue of cleaning Ganga is shuttling between two Ministries. The Bench said that the cleaning project should be done in stretches as it cannot be undertaken at one go. The issue of cleaning up of river Ganga has been monitored by the apex court and several applications have been filed. The 2,500-kilometre river passes through 29 major cities, 23 small cities and 48 towns. The ambitious Ganga Action Plan to clean the river was launched by the then Prime Minister Rajiv Gandhi in 1985.