Deborah FreundIBRAHIM ABDOU IBRAHIM ALAMIR2022-06-012022-06-01https://drepo.sdl.edu.sa/handle/20.500.14154/59534This dissertation is composed of three unrelated chapters, all of which are on different topics. Chapter 1 : The Effect of Wind Speed and Particulate Matter to the Emergency Department of King Fahad Central Hospital in the Jazan Region of Saudi Arabia by Those Suffering from Asthma Chapter 2 : The Effect of Gasoline Prices on Road Fatalities in Saudi Arabia Chapter 3 : The Effect of Dust and Sand Storms on Asthma, Pneumonia, Cardiovascular Disease, and Upper Respiratory Disease: Primary Health Care Visits in Jazan, Saudi Arabiaen