A considerable number of non-governmental organisations (NGOs) are also involved in developing environmental indicators, both at the national and international level, which in some cases focus on agri-environmental issues, such as recent work by the European Centre for Nature Conservation (2000), Worldwatch Institute (see Brown et al., 1999), the World Resources Institute (1995) and the World Wide Fund for Nature (1995;2000).
Brown, L.R., M. Renner and B. Halweil (1999), Vital Signs 1999: The Environmental Trends that are Shaping Our Future, Worldwatch Institute, Washington, D.C., United States.
ECNC [European Centre for Nature Conservation] (2000), Agri-environmental Indicators for Sustainable Agriculture in Europe, Edited by D.M. Wascher, ECNC Publication Technical report series, Tilburg, The Netherlands. Available at: www.ecnc.nl/
World Resources Institute (1995), Environmental Indicators: A Systematic Approach to Measuring and Reporting on Environmental Policy Performance in the Context of Sustainable Development, Washington, D.C., United States.
World Wide Fund for Nature [WWF] (1995), Measuring Progress Toward Bio-Intensive IPM: A Methodology to Track Pesticide Use, Risks and Reliance, WWF International, Gland, Switzerland.
WWF (2000), Living Planet Report 2000, WWF International, Gland, Switzerland. Available at: www.panda.org/livingplanet/lpr00/