Members of the local voluntary group, the Canaan Riverside Green Peace, remove debris from the Nairobi River after rains at Dandora slum in Nairobi on June 5, 2021, on World Environment Day. Every weekend for the past two years, the group has cleaned the filthy river and planted about five hundred trees to create a forest which filters the smoke from a dumping site nearby. (Photo by Yasuyoshi Chiba/AFP Photo)
