The purpose of this Article is to protect the health, safety, convenience and general welfare of the public by providing a comprehensive review of plans for uses and structures that may have impacts on traffic, services and utilities, environmental quality, water resources, drainage and community character. The Town encourages site plans to be designed to utilize energy efficient technology and renewable energy resources, and adhere to the principles of energy-conscious design with regard to orientation, building materials, shading, landscaping and other elements. With respect to building design, consideration should be given to the architectural style and its relation to the prevailing character and scale of buildings in the neighborhood. Factors to be considered include appropriate building materials, screening, breaks in roof and wall lines, massing and other architectural techniques. The construction, alteration, enlargement or reconstruction of buildings that are to be used exclusively for residential purposes shall be exempt from the provisions of this Article. Any use or structure, or expansion thereof, referred to in section 3 of Chapter 40A of the Massachusetts General Laws shall not be exempt from the provisions of this article, provided any of the criteria contained in § 210-134 also applies.