Aslam Khan warehouse yard, Shershah, Karachi, Pakistan. Sher Shah in Karachi is one of the principle markets for second hand and scrap materials where all sorts of electronics, electrical, spare parts, are smuggled. Goods arrive by sea and land, non-usuable waste is crushed into cubes .The presence of these cubes dumped alongside water bodies or the disposal at landfills are extremely injurious to all living beings including humans.