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The article presents the concept of sustainable development and its evolution over time. The authors analyse possibilities for promotion of clean technologies within the context of sustainable development. There are presented and analysed advantages of sustainable development and of utilisation of clean technologies for achieving the targets linked with climate changes. The authors have presented and analysed a case study regarding utilisation of a clean technology in an industrial sector. The case study is referring to modification of a furnace through introduction of a heat recovery unit from flue gasses for pre-heating of combustion air. The results of the complex energy, economic and environment analysis show that utilisation of this solution leads to energy and financial savings and to reduction of the environment impact. In conclusion there is shown the importance of the sustainable development and the implications of clean technologies in the energy sector.

The paper presents the concept of services in energy efficiency field. The authors have presented and motivated the necessity of services of energy manager and auditor and their importance for promotion and support of energy efficiency. There has also been presented the legal framework for professional training of these experts. There have been defined in the paper different terms for energy efficiency services sector. The authors have presented different services that can be provided by energy manager and auditor. There have been presented general and specific objectives for training and formation of energy managers and auditors. In conclusions there have been highlighted results that can be achieved after formation of energy managers and auditors from the professional ethic and psychological points of view.

Energy efficiency has become an economic necessity, expressed by the condition of focused energy cost reduction in the share of total production costs. Estimated potential energy savings for various industrial sectors is in the range of 1050%. In this paper has explained the meaning and importance of energy efficiency and has reviewed its growth potential in various industrial sectors and the main directions of increasing energy efficiency. Most packages of measures to increase energy efficiency have the immediate result and reduce environmental impact. The essence of the right energy policy is to achieve a balance between energy supply and demand conditions of the economically affordable, socially and environmentally. It was also presented the legal framework to support actions to promote energy efficiency