Australian scientist Tim Flannery says businesses seeking carbon credits to offset greenhouse gas emissions could go online to do direct deals with Papua New Guinea villages.
Mr Flannery, who is in PNG, has called for industrialised nations to address the global warming problem they helped create.
He says these nations had a debt to pay, and must aid the fight against poverty in countries like PNG by protecting forests and biodiversity.
He says his proposed direct carbon trading system would use satellite technology and rely on buying online by industrial firms, NGOs or governments seeking carbon credits.
Mr Flannery says buyers would get credits to offset industrial emissions, villagers would get paid for preserving their forests, and biodiversity would be protected.