To promote, protect and facilitate any or all of the following: the public health, safety, morals and general welfare; coordinated and practical community development and proper density of population; guidance, protection and improvement of amenity, convenience, future governmental processes and functions; guidance on uses of land and structures, type and location of streets, roadways, public grounds and facilities; the provision of adequate light, water and air, access to incident solar energy, police and fire protection, transportation, sewerage and schools; and preservation of the natural, scenic and historic values in the environment.