New Delhi, Nov. 16: The Union Government is having second thoughts on the advisability of enacting separate legislation to control air pollution. The National Committee on Environmental Planning and Co-ordination to which a draft Bill on air pollution was referred by the Union Health Ministry is now making a “critical examination” of the provisions of the Bill. The Chairman of the committee, Dr. B.D. Nagchoudhuri, recently had discussed with the Health Ministry and a number of State Governments on the subject. Some of the State Governments are of the view that there is no need for a separate Act on air pollution as the Bill could be incorporated in a comprehensive Act covering all types of environmental pollution. The Centre has already enacted the Water Pollution Bill to check pollution of inland and coastal waters in India. Under this Act, water pollution boards also have been set up both at the Centre and in the States. The States, which advocate a comprehensive Environmental Pollution Act including air, water, and other types of pollution have argued that such an Act would bring down the costs of implementation to a large extent. Instead of having laboratory, staff and other facilities for various types of pollution, a combined set-up would enable State Governments save on various overheads besides facilitating an integrated approach to combating pollution.