This Information Note outlines how forests in the UK contribute to the carbon cycle on both a local and a global scale. It explains the key terms that are used in discussions of the part played by forests and carbon in global warming and presents some of the facts and figures behind the many complex issues surrounding the subject. The roles played by growing trees and mature woodland, forest soils, harvested wood and wood products in use are discussed and compared. The statistics and supporting interpretation identify the current and potential contribution of UK woodland in mitigating global warming. Information is also provided on carbon management in forests which is relevant to woodland managers and forestry practitioners as well as to those considering involvement in carbon trading and carbon-neutrality schemes.