Sir: Sewage problems continue to haunt Karachi for decades. In the past 18 years that I have lived in Karachi, sewage sludge has not yet been solved. Even though media has repeatedly emphasised on the need for the city administration to take care of sewerage water, which largely contributes towards deaths related to consumption of contaminated water. I believe that people should partake in initiatives alongside city government so that human lives can be saved. MUHAMMAD ANAS ANWAR Karachi