42 Technical and diagnostic expertise services provided by engineers and technicians for assessing, optimising and tracking over time the energy performance of buildings, environmental districts, building stock and energy infrastructures, optimising energy resources, forecasting energy use, tracking of carbon and energy footprint, production, distribution, storage of energy and the active control of production, storage and use of energy provided by engineers; forecasting services for energy performance, namely, evaluations, estimates and research in the field of energy performance of buildings, environmental districts, building stock and energy infrastructures, optimising energy resources, forecasting energy use, tracking of carbon and energy footprint, production, distribution, storage of energy and the active control of production, storage and use of energy; engineering services related to energy performance of buildings, environmental districts, building stock and energy infrastructures, optimising energy resources, forecasting energy use, tracking of carbon and energy footprint, production, distribution, storage of energy and the active control of production, storage and use of energy; technical project studies, namely, technical consulting in the field of energy measurement to improve energy efficiency; computer programming for automated systems and installations for technical building management; consultancy and information services by engineers in the field of energy measurement to improve energy efficiency, namely, providing advice services covering energy auditing of neighbourhoods and stock of others integrating energy production units, energy advice to public institutions, users and investors; engineers' services