**Author details**

Saifullah Khan1 \*, Mehmood Ul Hassan2 and Aslam Khan2

1 Institute of Social Sciences, Bahauddin Zakariya University, Multan, Punjab, Pakistan

2 Department of Geography, University of Peshawar, Khyber Pakhtunkhwa, Pakistan

\*Address all correspondence to: saifullahkhan33@gmail.com

© 2019 The Author(s). Licensee IntechOpen. This chapter is distributed under the terms of the Creative Commons Attribution License (http://creativecommons.org/licenses/ by/3.0), which permits unrestricted use, distribution, and reproduction in any medium, provided the original work is properly cited.
