The Stockholm Conference motivated countries around the world to monitor environmental conditions as well as to create environmental ministries and agencies.[15][16][17] Despite these institutional accomplishments, including the establishment of UNEP, the failure to implement most of its action programme has prompted the UN to have follow-up conferences.[18] The succeeding United Nations Conference on Environment and Development convened in Rio de Janeiro in 1992 (the Rio Earth Summit), the 2002 World Summit on Sustainable Development in Johannesburg and the 2012 United Nations Conference on Sustainable Development (Rio+20) all take their starting point in the declaration of the Stockholm Conference.