One of the largest industrial areas in Pakistan is located in Korangi. Known as the Korangi Industrial Area, or KIA, this region is marked by large buildings and lots, many having white-roofed structures. A conspicuously dark region marks the location of steel works; while bare soil and built materials are present, significant vegetation cover also contributes to the dark hues. In addition to steel, the KIA also includes textile, pharmaceutical, automobile, chemical, and flour industry facilities.
image pasted below can be seen directly at http://eoimages.gsfc.nasa.gov/images/imagerecords/81000/81183/ISS035-E-024919_lrg.jpg
I liked this text a lot and copied it completely from NASA Earth Observatory website http://earthobservatory.nasa.gov/IOTD/view.php?id=81183&src=eoa-iotd