In Australia, action on climate change has been one of the top three political issues in recent elections. Australia has a diverse mix of Christian denominations, other world religions and indigenous spiritualities. This paper describes several different climate activist groups within Australia which span multi-denominations and multi-religions along different models. Australian Religious Response to Climate Change is a national climate activist group. It is an individual member based group, and also has organizational members from many faith groups. Membership includes Christians, Muslims, Hindus, Brahma Kumaris, Buddhist, Jewish and Unitarians individuals and organisations. ARRCC's primarily role is political activism such as the promotion of the fossil fuel treaty and meetings with politicians; community activism such as banners at places of worship; and providing a repository of faith-based climate activism resources. Common Grace is a Christian non-profit organization which operates on supporter donations, and it includes partnerships with local churches. Its work focusses on justice across four areas, with emphasis on connecting with first nations people. These areas are Indigenous Justice, Creation and Climate Justice, Asylum-seeker Justice and Domestic and Family Violence Justice. Its activities include podcasts, an annual conference, teaching materials and devotional materials. A Rocha Australia is part of the A Rocha family of Christian environmental conservation organizations. It is non-denominational and is member-based and operates from donations. A majority of its work is hands-on conservation of wilderness areas. The paper explores similarities and differences in the approaches of these organisations, and investigates their contributions to inter-religious and inter-denominational cooperation, understanding and respect as a secondary benefit to their direct creation care work.