Cameroon's first protected area in the northern part of the country was established in 1932 under the French colonial administration of the black francophone Africa. The first forest reserve created was the Mozogo Gokoro Reserve 12 June 1932 and the second in the same year was the Benue Reserve on 19 November 1932. The third reserve, the Waza Reserve was established on 24 March 1934, initially covering an area of which was extended in 1935 to cover ; this is one of the most popular reserves in the country. Until 1975, there were 9 protected areas with greater focus on the north than the south. Following the Earth Summit of Rio de Janeiro in Brazil in 1992, the number of protected areas increased substantially and were well distributed covering all the ten provinces of the country in widely differing topographic, climatic, hydrological and biological conditions. There are 20 protected reserves which include national parks, zoos, forest reserves and sanctuaries.