This strategy features in the framework of Agenda 21 as formulated at UNCED (Rio de Janeiro, 1992), now coordinated by the United Nations Commission on Sustainable Development and implemented through national and local authorities. Agenda 21 recommends preventing adverse effects of agricultural activities on water-quality for other social and economic activities and on wetlands through, inter alia, optimal use of on-farm input and minimizing use of external input in agricultural activities.