Taxi drivers should be given tax concessions for switching to liquefied petroleum gas (LPG) vehicles, provisional legislators and environmentalists said yesterday. The environmental affairs panel and the Advisory Council on Environment yesterday discussed budgetary proposals behind closed doors. 'The two sides agreed that taxi drivers deserve tax cuts for switching to LPG vehicles,' panel chairman Tso Wong Man-yin said. It was the second time the two bodies had met, but the first time they had reached an agreement. Mrs Tso said tax relief would help speed up the more widespread use of LPG vehicles and reduce air pollution. Thirty LPG taxis were introduced late last year under a pilot scheme to help improve air quality. The Planning, Environment and Lands Bureau said: 'Once LPG taxis are proven to be technically practicable in Hong Kong, our aim is to devise a strategy to encourage taxi operators to switch to LPG as soon as possible. 'It is too early to say what kind of incentives should be appropriate.'