Solvents used to dry clean clothes are usually chlorinated compounds such as tetra chloroethylene (CCl2=CCl2) which is a potential human carcinogen. These chlorinated compounds also have serious environmental consequences such as greenhouse effect, ozone depletion, water pollution, etc. The use of liquefied carbon dioxide with a suitable detergent for dry cleaning will not be completely safe from the point of view of pollution but will be less harmful.