Review of Harmful Substances: GESAMP Reports and Studies No. 2

The present Review reflects the state of knowledge available to the experts at the time of its compilation,i.e. the years 1972-1974. Scientific knowledge is continually changing and developing, and as it does so, changes will be required in this Review. For this reason, this document will be updated regularly. It is strongly recommended that the most up-to-date version of it should be used whenever possible.