THE Green Groups United Front will be launched on Wednesday in the groups' first joint bid to lobby the Government on environmental policy. The territory's four major green groups - Green Power, Friends of the Earth, the Conservancy Association and the World Wide Fund for Nature - agreed last week to the move. They are drafting a joint statement on environment policy, which the Planning, Environment and Lands Branch is reviewing and will release in June. It is expected the branch will announce plans to broaden the agenda from the present focus on pollution to include issues raised in the United Nations Earth Summit last June, such as conservation and sustainable development. Friends of the Earth's director, Mrs Mei Ng Fong Siu-mei, said the groups wanted to present a united stance on the policy review to add weight to their arguments, although they have also made individual submissions. Details of their statement are still being worked out, but it is scheduled to be released on Wednesday so as to ensure press coverage on Thursday which is Earth Day. The groups will also lobby legislators and the Government on Wednesday. ''It's time for the public to see we're all working for the same cause, and divide our labour so we're more effective and efficient,'' Mrs Ng said. The groups previously worked together on an ad hoc basis, to oppose the Shalotung golf course proposal last year and plans by China Light and Power in 1990 to build a power station at the remote Fan Lau site on Lantau Island. Both actions were successful. The Conservancy Association's spokesman, Mr Gordon Ng Ting-leung, said the groups also had met periodically over the last couple of years but felt it was time to formalise that process and Earth Day seemed an appropriate time. It is anticipated the United Front could serve as a forum for future joint projects and for co-ordinating activities, which had been a problem as groups sometimes scheduled fund-raising events on the same day. Green Power's Dr Simon Chau Sui-cheong said it also showed the groups could get along together, after they had been criticised in the past for failing to do so. Ms Amy Lau Shuk-man of the World Wide Fund for Nature warned that the front should not be seen as a new association or federation, but a follow-up to earlier activities.