The 2002 report is considerably different from previous reports of the Solvents Technical Options Committee (STOC). The physical structure has been designed so that each sub-sector has a self-contained chapter that summarises new, essential, information and the technology choices available. It is intended that these individual chapters may be extracted for copying to interested parties, while remaining short enough for translation into local languages and subsequently distributed. To achieve this, the older technological details are not as complete as in previous editions. Readers requiring a more complete treatise are referred to the 1998 report.