Stocks of obsolete, unwanted and banned pesticides continue to represent a serious public health and environmental threat, particularly in developing countries. This tool kit, in three volumes, has been developed for country project managers, officers of government ministries of agriculture, environment and health, and regional and district officers and storekeepers, to support them in planning all the steps of a safe disposal programme. Vol. 1 covers: A, Environmental risk assessment; B, Prioritization of stores; C, regional prioritization and risk tracking.