economical-ecological efficiencyThe competency in performance in business matters involving the relation between financial and environmental principles
energy efficiencyRefers to actions to save fuels by better building design, the modification of production processes, better selection of road vehicles and transport policies, the adoption of district heating schemes in conjunction with electrical power generation, and the use of domestic insulation and double glazing in homes
improvement of efficiencyThe beneficial development or progress in the volume of output that is achieved in terms of productivity and input, or in getting the maximum possible output from given or allocated resources