THE Government aimed to recover costs rather than address the problem of pollution under its ''user pays'' scheme for sewage disposal, United Democrat legislator the Reverend Fung Chi-wood said yesterday. Mr Fung said he was worried the Government would start to charge for other basic services on the same principle. ''I am worried that all the charges adding up together will become a heavy burden for low-income families,'' he said. Mr Fung said the policy address did not say how air pollution caused by the growing number of vehicles in the territory could be controlled. He called on the Government to encourage drivers to switch to petrol instead of the environmentally hazardous diesel fuel. The Government could achieve this by increasing the tax on diesel, which was 50 per cent less than that on petrol. He welcomed Mr Patten's proposal for companies to appoint ''green managers''. But he wondered how many firms would appoint such managers voluntarily. ''The Government should not rely on the voluntary co-operation of the private sector,'' he said. ''And there should be legislation.'' He supported the setting up of the Environmental and Conservation Fund. but questioned who would decide the use of the fund and what its criteria would be.