The fourth World Congress R'99 will take place from 2-5 February 1999 in Geneva. The event will address Integrated Resources Managment (IRM), or the recovery of economic value from waste streams by efficient managment, while considering ecological, economic, social and phsychological factors. There will be a special emphasis on the economy of IRM; technical and economic feasibility of waste management processes; diversion from landfills to recycling; impact on employment of waste management strategies; structural changes from traditional branches towards recovery and recycling industries; waste reduction and avoidance strategies (eco-design); consequences of new legislation; energy recovery and dismantling and separation technologies. For further details please contact Dr A Barrage, c/o PEAK Ltd, Zurich, fax: +41 1 386 44 45.