The purpose of this chapter is to encourage the most appropriate use of land throughout the village and to conserve the value of property, with due consideration for the character of the zones and their peculiar suitability for particular uses, all in accordance with a comprehensive plan designed to lessen congestion in the streets; to secure safety from fire, flood, panic and other dangers; to promote health and the general welfare; to provide adequate light and air; to avoid all pollution; to prevent the overcrowding of land, to avoid undue concentration of population and to that end to regulate the height and size of buildings and other structures; the percentage of the area of the lot that may be occupied; the size of yards, and other open spaces; the density of population, and the location and use of buildings, structures and land for trade, industry, residence or other purposes; and the location of these uses within the limits of the village.