Brazil, Canada and Britain have lent backing to a Papua New Guinea proposal to fight global warming.
The PNG prime minister Sir Michael Somare wants to developing countries to be paid for preserving their rainforests.
Ben Lowings reports.
"Expansive jungles are thought to act as sinks to convert the greenhouse gas carbon dioxide, back into oxygen."
This prevents too much CO2 from staying in the atmosphere and warming up the planet by acting like a blanket.
Prime Minister Somare has been championing the idea which has been debated at this week's UN climate conference in the Canadian city of Montreal.
Sir Michael has been working to put together what he calls a Coalition of Rainforest Nations to be paid through carbon credits for preserving rainforests.