This chapter is enacted to promote the public health, safety, morals and general welfare of the residents of Caernarvon Township by encouraging the most appropriate use of land and buildings; preventing the overcrowding of land; avoiding undue congestion of population; providing for adequate light and air; conserving the value of land and buildings; securing safety from fire, panic, flood and other dangers; facilitating the adequate provision of transportation, water, sewerage, school, and other public facilities.