Pakistan, July 10 -- Urbanization is increasing in the proportion of people living in towns and cities. It occurs because people continue relocating from rural areas to urban zones. Urbanization affects the physical environment through the impacts of the number of people, their activities and the increased demand on resources. Pakistan has the highest rate of urbanization in South Asia and the benefits of urbanization can only be accrued by sound public policies. A frequent traveller in central Punjab undoubtedly notices that the region bounded by Sialkot, Wazirabad, Gujranwala, Sheikhupura, Faisalabad, Sahiwal, Kasur and Lahore, has developed into a one big mushroom of urban slums. Villages and small towns have merged with adjoining citi...