International cooperation in relation to the benefits of pesticides is well known. Most outstanding is work for the control and eventual eradication of malaria. Less well known is cooperation in learning the dangers of chemical control and in developing safety measures that permit continued utilization of valuable compounds, both in agriculture and public health. Even in the technically advanced countries there are still problems associated with the manufacture, formulation, and especially the use of pesticides. These problems are accentuated in places where the potential dangers in the use of these poisons are not so well understood and their proper labeling is neglected. (Portions of this document are not fully legible)