providing information, technical advice and inspections relating to planning and constructing buildings and landscaping in a manner which improves energy efficiency and conservation of natural resources; encourages waste reduction, recycling and the use of recycled materials; promotes the construction of buildings which are healthier for users by selecting materials and construction techniques which reduce potentially toxic gas emissions and buildup and by providing ventilation; and which encourages site selection and building layout to reduce adverse traffic and other environmental impacts of building construction and to take advantage of solar energy at the site