35 Business marketing consulting services; procurement, namely, purchasing energy consumption reducing equipment for others; and billing services; consulting services in the field of energy management; energy usage management, control, use and conservation for others, namely, integrated energy usage management of independently owned heating, cooling, lighting, and electric power generating systems and machinery, namely, turbines, boilers, generators, chilling plants, lighting equipment and associated wiring, conduits and control apparatus for commercial, industrial, governmental and institutional buildings; and energy usage management for others in industrial, commercial, governmental and residential facilities