Air quality of the coastal area is significantly different than the inland area where the breeze pattern affects the dispersion characteristics of air pollution. Recently, urbanization in the coastal area increases which obstructs the natural breeze flow pattern. It subsequently affects the breeze boundary layer and air quality of the surrounding. This book covers the issues related to breeze boundary layer and air pollution dispersion by introducing different numerical simulation approaches. Most of the data presented are based on the research data and it is part of the Ph.D. dissertation of author therefore the contents in this book will be helpful for postgraduate students, researcher, lecturer, etc. in further. Author would like to express profound gratitude to Prof. Heekwan Lee for his scholastic supervision, and endless support throughout the research work. Author also would like to acknowledge Incheon National University, Republic of Korea for providing the platform and necessary supports during the entire study period.