Sir: Karachi, which used to be called a city of lights, is now known as the city of billboards. Around 3,000 billboards have been placed on the busiest roads of Karachi which include Shahra-e-Faisal, Karsaz, Hassan Square, Metropol to Gora Qabristan and many others places. Many of these billboards have been placed illegally and there is no proper check and balance method for their size and placement. These colourful billboards cause disturbance and divert attention of drivers. Another reason is that these billboards become a serious threat to lives during rainfall. The Supreme Court has already ordered removal of these illegally placed billboards. The concerned authorities should take notice of all these illegal billboards. AREEBA A SIDDIQUI Karachi