Some 50 activists completed the construction of a dam across one of the canals built to drain the rainforest and peat soils on Tuesday (3 November).
According to the NGO, the message hopes to call on world leaders to end global deforestation, which it claimed is responsible for a fifth of all greenhouse gas emissions, with Indonesia being the world's third largest climate polluter after China and America.
Bustar Maitar, Greenpeace Southeast Asia campaigner, said: "To pull the world back from the brink of a climate crisis we need Obama, Merkel, Sarkozy, Brown and other world leaders to commit to much deeper cuts in emissions from fossil fuels and to provide the critical funds needed to end deforestation."
