linguistic:voice_change, quality:corruption
Geography

Natural landscapes range from the savanna plains in the North Niari flooded forests, to the Congo River, to the rugged mountains and forests of Mayombe, and 170 km of beaches along the Atlantic coast.

Congo is located in the central-western part of sub-Saharan Africa, along the Equator, lying between latitudes 4°N and 5°S, and longitudes 11° and 19°E. To the south and east of it is the Democratic Republic of the Congo. It is bounded by Gabon to the west, Cameroon and the Central African Republic to the north, and Cabinda (Angola) to the southwest. It has a coast on the Atlantic Ocean.

The southwest is a coastal plain for which the primary drainage is the Kouilou-Niari River; the interior of the country consists of a central plateau between 2 basins to the south and north. Forests are under increasing exploitation pressure. Congo had a 2018 Forest Landscape Integrity Index mean score of 8.89/10, ranking it 12th globally out of 172 countries.

Congo lies within 4 terrestrial ecoregions: Atlantic Equatorial coastal forests, Northwestern Congolian lowland forests, Western Congolian swamp forests, and Western Congolian forest–savanna mosaic. Since the country is located on the Equator, the climate is more consistent year-round, with the average day temperature a humid 24 °C (75 °F) and nights generally between 16 °C (61 °F) and 21 °C (70 °F). The average yearly rainfall ranges from 1,100 millimetres (43 in) in the Niari Valley in the south to over 2,000 millimetres (79 in) in central parts. The dry season is from June to August, while in the majority of the country, the wet season has 2 rainfall maxima: 1 in March–May and another in September–November.

In 2006–07, researchers from the Wildlife Conservation Society studied gorillas in "heavily forested" regions centered on the Ouesso District of the Sangha Region. They suggest a population on the order of 125,000 western lowland gorillas whose isolation from humans has been mostly preserved by "inhospitable" swamps.