The display, storage or parking of materials, goods, supplies, or equipment outside of the dwelling is permitted in an enclosed accessory building, or in the side or rear yard. Where possible, the area used for such display, storage or parking shall be screened from view from all public streets and adjacent property through the use of natural landscaping materials, or, a combination of natural landscaping and other man-made or fabricated screening materials, e.g., fencing, etc.;