Palm oil & climate change
The practice of draining and converting tropical peatland forests in Indonesia is particularly damaging as these "carbon sinks" store more carbon per unit area than any other ecosystem in the world.
Forest fires set to clear vegetation for oil palm plantations are one source of CO2 released from land clearing.
For example: In 1997, such fires in Indonesia may have been one of the main sources of global CO2 emissions. An estimated 0.81-2.57 gigatons of carbon were released into the atmosphere by the fires: 13-40% of the mean annual global carbon emissions from fossil fuels that year.