Sir: Civic problems of our city of lights, Karachi have increased with each passing moment. Once Karachi has a proper drainage system and people used to enjoy monsoon rains but rapid increase in population, litter increased too that caused choking of the drainage system and sewerage and till today, Karachi sinks after every rain. Karachi district government must act properly and remove mountains of littering and garbage and educate people to keep their city keep. ARSHAD MIR Karachi