What may be, size-wise, the largest petition ever handed in to any British Prime Minister will be presented at Number 10 Downing Street by Christian environmental campaigners tomorrow.

Two new study guides on the Church and the environment are published this week.

Christian climate campaigners have appointed an award-winning documentary maker as their lead campaign strategist. Mark Dowd, a former Dominican Friar and television producer / presenter, is to take up the post with Operation Noah.

Christians from many denominations joined protest rallies in more than 50 cities around the world this weekend, calling on world leaders at the UN Climate Change Conference in Bali to effectively tackle the threat of global warming.

Christians of all denominations will unite in London tomorrow (Saturday) and join a national demonstration to demand that Britain's representatives at Bali lead by example over climate change, by cutting Britain's greenhouse gas emissions further and faster.

Operation Noah, the churches' campaign to avert catastrophic climate change, has appointed Ann Pettifor, one of the architects of the widely-praised Jubilee 2000 anti-debt initiative, as its new Campaign Director.