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According to the World Coal Institute:

Carbon capture and storage (CCS) is already being used on a coal gasification plant at one of the largest and longest running CCS projects in the world in Weyburn, Canada. The Great Plains synfuels plant in Dakota, USA, produces natural gas and other chemicals through the gasification of low quality coal. 60% of the CO2 generated from the gasification process is captured and transported via pipeline to the Weyburn oil field in Saskatchewan, Canada. At the Weyburn site, the CO2 is used for enhanced oil recovery (EOR) and stored geologically. Weyburn has been operating since 2000 with a total of 5 megatonnes of CO2 stored. In this case, the sale of the CO2 is an extra revenue source for Dakota Gas while reducing greenhouse gas emissions. - World Coal Institute