(260322) -- NAIROBI, March 22, 2026 (Xinhua) -- A hippo swims in the sewage treatment pond of Dandora Estate Sewage Treatment Works in Nairobi, Kenya on Feb. 6, 2026. TO GO WITH "Feature: Healing Nairobi's 'kidney': How Chinese tech is reviving the 'place of cool waters'" (Xinhua/Xie Jianfei)


















