Indonesia has chosen once of its largest and richest provinces to test efforts to reduce greenhouse gas emissions by saving forest and peatlands, a key part of a $1 billion climate deal with Norway.

Central Kalimantan province on Borneo island is the second largest producer of greenhouse gases among Indonesia’s 33 provinces because of deforestation, destruction of carbon-rich peat swamps, and land use change, the government says.

“The assessment showed that Central Kalimantan is a province with large forest cover and peatland and faces a real threat of deforestation,” top technocrat Kuntoro Mangkusubroto, head of a special presidential delivery unit charged with managing the Norway deal, said in a statement on Thursday.