gasification is shipped to Canada, where it is injected into the ground to aid in oil recovery. A drawback of the carbon sequestration process is that it is expensive compared to traditional processes. See also Asia-Pacific Partnership on Clean Development and Climate Biochar Carbon capture and storage Carbon sequestration Carbon sink Climate change mitigation Coal mining in the United States Coal phase out Coal-water slurry fuel Coke fuel Environmental impact of the coal industry Fluidized bed combustion Kyoto Protocol Refined coal References Further reading External links International Energy Agency - Clean Coal Centre National Energy Technology Laboratory compendium homepage The Future of Coal: An Interdisciplinary MIT Study Institute for Clean & Secure Energy US federal Office of Clean Coal and Carbon Management Chemical processes Emissions reduction Energy economics Energy development Coal technology Chemical engineering Coal Environmental controversies Environmental mitigation it:Carbone pulito