Sewage flow in Istanbul's Uskudar raises environmental concerns / Chemical pollution increases more than 100-fold after sewage discharges in South Coast waters / Tambaram Corporation's lake restoration project faces criticism for overlooking sewage pollution concerns / New River Rescue Kit empowers campaigners to tackle sewage pollution / Residents of Mexico City suburb are anxious after living over a month in black sewage water / San Francisco has a sewage problem. Climate change is making it worse / Muttukadu backwaters faces sewage, water level challenges / Foul stench pervades Chitlapakkam streets as sewage overflows for a week / Sewage pollution could jeopardise Olympic swimming events in the River Seine, NGO warns