In this Friday, March 23, 2018 file photo, young Maasai men relax and play a game of pool at a bar by the side of the road in the late afternoon at Mkata junction, near Mikumi National Park in Tanzania. A U.S.-based group said Thursday, May 10, 2018 that tens of thousands of Tanzania's ethnic Maasai people have been left homeless after their houses were burned to keep the savannah open for tourism benefiting foreign safari companies. (Photo by Ben Curtis/AP Photo)





A prisoner warms up before the start of a mock World Cup soccer match between Russia and Saudi Arabia, as part of a month-long soccer tournament involving eight prison teams at the Kamiti Maximum Prison, Kenya's largest prison facility, near Nairobi, Kenya, June 14, 2018. (Photo by Baz Ratner/Reuters)





A recycler drags a huge bag of paper sorted for recycling past a heap of non-recyclable material at Richmond sanitary landfill site on 2 June 2018 in the industrial city of Bulawayo. Plastic waste remains a challenging waste management issue due to its non-biodegrable nature, if not managed properly plastic end up as litter polluting water ways, wetlands and storm drains causing flash flooding around Zimbabwe's cities and towns. Urban and rural areas are fighting the continuous battle against a scourge of plastic litter. On June 5, 2018 the United Nations mark the World Environment Day which plastic pollution is the main theme this year. (Photo by Zinyange Auntony/AFP Photo)





A child walks near destroyed houses by flooding water after a dam burst, in Solio town near Nakuru, Kenya May 10, 2018. (Photo by Thomas Mukoya/Reuters)





Somalis look at the bodies of five people killed during a raid in the Lower Shabelle region and then brought to the Madina hospital in Mogadishu, Somalia Thursday, May 10, 2018. Somali intelligence officials say U.S. and Somali commandos seized three men thought to be commanders with the al-Shabab extremist group during the deadly raid, while a local elder said five people thought to be banana farmers were killed in the raid late Wednesday. (Photo by Farah Abdi Warsameh/AP Photo)





Smoked monkey meat is displayed at an open-air market during a vaccination campaign against the outbreak of Ebola, in Mbandaka, Democratic Republic of Congo, May 23, 2018. (Photo by Kenny Katombe/Reuters)





An agent of the National Institute of Public Hygene (INHP) carries out fumigation in the Anyama district of Abidjan on June 9, 2018 as part of the ongoing fight against dengue fever. In 2017, Ivory Coast was one of the West African states in which outbreaks of diseases such as Dengue were reported. (Photo by Sia Kambou/AFP Photo)





Students of St Dominic Bukna Secondary school take their English test outside due to their overcrowded class room in Kisumu, Kenya, on May 31, 2018. (Photo by Yasuyoshi Chiba/AFP Photo)





Residents of a nearby building stand on the roof to get a view of the scene of a five-storey collapsed building in the Huruma neighborhood of Nairobi, Kenya Sunday, June 3, 2018. An official from Kenya's Disaster Management Unit at the scene said that two had died, a number were injured, some were still missing, but that many residents of the building had managed to escape before the building fully collapsed. (Photo by Ben Curtis/AP Photo)





Women break raw cashew nuts at a cashew nuts processing factory in the central Ivorian city of Bouake on May 24, 2018. (Photo by Issouf Sanogo/AFP Photo)





Three zebras are painted on a wall during a workshop of Portuguese street artist Ricardo Romero as part of his worldwide art project “Project Matilha” which raises awareness of human and animal rights in Kibera slum of Nairobi, on April 25, 2018. (Photo by Yasuyoshi Chiba/AFP Photo)





Recyclers and birds scour the Robinson Deep landfill at the edge of the city Johannesburg, South Africa on April 29, 2018. (Photo by Graham De Lacy/Greatstock/Barcroft Images)





A boy looks at the cover pictures of some recent DVDs' at a movie shop in Kibera, the largest slum in the city of Nairobi, Kenya on June 19, 2018. (Photo by Simon Maina/AFP Photo)





A worker picks flowers designated for export at a farm near the town of Thika, Kenya April 27, 2018. (Photo by Baz Ratner/Reuters)





Survivors sit outside their destroyed house after a dam burst, which unleashed water at nearby homes, in Solio town near Nakuru, Kenya May 10, 2018. (Photo by Thomas Mukoya/Reuters)





A child walks in his house, which was partly destroyed by flooding water after a dam burst, in Solio town near Nakuru, Kenya May 10, 2018. (Photo by Thomas Mukoya/Reuters)





Coffins are seen arranged inside a mass grave during the burial of people killed when a dam burst its walls, overrunning nearby homes, in Solai town near Nakuru, Kenya May 16, 2018. (Photo by Thomas Mukoya/Reuters)





A trader arranges second-hand pairs of soccer shoes for sale at an open air market in Nairobi, Kenya May 18, 2018. (Photo by Thomas Mukoya/Reuters)





Congolese boys paddle their boat along the Congo River during the vaccination campaign aimed at beating an outbreak of Ebola in the port city of Mbandaka, Democratic Republic of Congo on May 22, 2018. (Photo by Kenny Katombe/Reuters)





A street trader sells live chickens on a street in Pietermaritzburg, South Africa May 21, 2017. (Photo by Rogan Ward/Reuters)





People watch as rescue workers search the rubble of a collapsed five-storey building, where at least three people have been confirmed dead and several are feared trapped inside, in a residential area of Nairobi, Kenya, June 3, 2018. (Photo by Baz Ratner/Reuters)





A Somali man prepares traditional cakes and biscuits inside a bakery ahead of the upcoming Eid al-Fitr holiday, marking the end of the Muslim holy month of Ramadan, in Mogadishu, Somalia June 13, 2018. (Photo by Feisal Omar/Reuters)





Muslims attend Eid al-Fitr prayers in Addis Ababa, Ethiopia on June 15, 2018. (Photo by Tiksa Negeri/Reuters)





A Somali boy stands next to a structure of makeshift tent at Tawakal IDP camp in Mogadishu, Somalia, on June 19, 2018. (Photo by Mohamed Abdiwahab/AFP Photo)





In this May 22, 2018 photo provided by UNICEF, schoolchildren wash their hands to help contain the Ebola outbreak before entering a classroom in the north-western city of Mbandaka, in Congo. Congo's health ministry announced six new confirmed Ebola cases and two new suspected cases Tuesday as vaccinations entered a second day in an effort to contain the deadly virus in the city of more than 1 million. (Photo by Mark Naftalin/UNICEF via AP Photo)





Civilians wave the Malian national flag as they protest against the lack of transparency of the presidential election's campaign, on June 2, 2018 in Bamako. At least a dozen people were wounded on June 2, 2018 in Bamako during a “peaceful march” called by the opposition and banned by the government. The demonstration gathered several hundred people, two months ahead of the presidential election, according to a correspondent of the AFP. (Photo by Michele Cattani/AFP Photo)





Somali children play football on a bulidling's upper floor as the sun sets in Mogadishu, Somalia, on June 7, 2018. (Photo by Mohamed Abdiwahab/AFP Photo)





Somali people watch the first match of the 2018 FIFA World Cup between Russia and Saudi Arabia on TV in Mogadishu, on June 15, 2018. (Photo by Mohamed Abdiwahab/AFP Photo)





A man carries a television through waist-deep flood water in Mogadishu on May 20, 2018 after homes were inundated in Somalia's capital following heavy overnight rainfall. (Photo by Mohamed Abdiwahab/AFP Photo)





A woman living at a camp for the internally displaced sits on high ground above a flooded street on May 20, 2018 in Mogadishu after temporary shelters were inundated in Somalia's capital following heavy overnight rainfall. (Photo by Mohamed Abdiwahab/AFP Photo)





In this photo taken on Friday, April 27, 2018, a boy stands outside his family home, which has been submerged by floods following prolonged heavy rains in Tana Delta, Coastal Kenya. More than 30, 000 people in Tana River county have been displaced by floods which has also killed more than 5 people. (Photo by Andrew Kasuku/AP Photo)





Residents excavate at the site of a recently-discovered mass grave in Gasabo district, near the capital Kigali, in Rwanda Thursday, April 26, 2018. Mass graves that authorities say could contain more than 2,000 bodies have been discovered in Rwanda nearly a quarter-century after the country's genocide. (Photo by Eric Murinzi/AP Photo)





Congolese soldiers from the Armed Forces of the Democratic Republic of Congo (FARDC) rest in Namoya, Maniema Province, eastern Democratic Republic of the Congo, April 29, 2018. (Photo by Goran Tomasevic/Reuters)





Samburu women of the Lorubai traditional dance group are seen wearing traditional beaded necklaces during a Peace Marathon for pastoralist communities at the Archers post in Isiolo, Kenya on April 26, 2018. The aim of the event is to bring the warring pastoralist communities of Samburu, Turkana, Borana and others together, and end the rivalry due to scarcity of pasture and water in the region. The peace marathon is organized by Kenya's Northern Rangeland Trust. (Photo by Simon Maina/AFP Photo)





Models wait before presenting eco-fashion using recycled or biodegradable materials during the “Fashion for Sustainable Future” event by UN Environment in Kisumu, Kenya, on May 31, 2018. “Beat Plastic Pollution” will be the theme of this year's World Environment Day on June 5. (Photo by Yasuyoshi Chiba/AFP Photo)