CATHOLIC bishops have warned the faithful against voting for the Greens in the state election, saying some of their policies were of ''grave concern''.

Yesterday the NSW Greens outlined a plan which would transfer government funding from wealthy private schools to public schools.

A two-page document entitled The Green Agenda is being circulated by Catholic agencies and through schools. It states the party's human rights and social policy areas are in direct conflict ''with the beliefs and values of virtually all religious people, and the beliefs of many other people as well''.

''Greens who are elected will bring a whole set of policies. You cannot pick and choose. They are not only concerned for the environment,'' it reads.

It also warns about voting for candidates who might share similar views, pointing out that some MPs in the main parties had voted for ''bad legislation'' such as same-sex adoption.