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Marine energy as one of the least utilized renewable energy resource requires more attention in the scientific and professional sense. This paper summarizes the energy potential, different types and operating principles of devices for the exploitation of wave energy in which the largest amount of untapped energy potential still resides. [ABSTRACT FROM AUTHOR]

This paper provides a brief overview of the use of solar energy in Croatia, especially in coastal areas. The current state of exploitation of solar energy and the future outlook for using this renewable energy source is also presented. [ABSTRACT FROM AUTHOR]

The aim of the research is to present the overall and significant impact of the urban water system on the environment, i.e. environmental protection in the context of increasing the use of renewable energy sources, and how such energy sources affect climate change in general. Renewable energy sources include: wind energy, water energy, solar energy, hydrogen energy, geothermal energy, biomass energy, tidal energy, wave energy, cold energy from space and others. The application of the principles of sustainable development leads to the need to use renewable energy sources, improve their technical characteristics and functioning, and find new methods and technologies to finally abandon the use of non-renewable energy sources. To this end, it is necessary to pursue a policy based on strategic planning and the use of an integrated approach in the operation and management of urban water systems. [ABSTRACT FROM AUTHOR]

Under the circumstances of increasingly visible climate change, most notably in the phenomenon of global warming, it has become more and more clear that the energy industry based on the exploitation of fossil fuels has significantly contributed to this development. Therefore, many countries acknowledge the need for a policy paradigm shift in the field of energy policy, which implies an increased relying on renewable energy sources and the improvement of energy efficiency. The author conducts a case study of Germany -- a forerunner in European efforts to link the energy industry based on renewable sources and environmental protection, and also on maintaining the security of energy supply. The paper tests whether this orientation of Germany is based on its policy capacity -- "the ability to marshal the necessary resources to make intelligent collective choices about and set strategic directions for the allocation of scarce resources to public ends" (Painter i Pierre, 2005: 2), and concludes that it is the internal state determinants, rather than policy diffusion, which have played a central role in Germany's attainment of a leadership position in the accomplishment of the "new energy paradigm". [ABSTRACT FROM AUTHOR]

Rapeseed production in Serbia is characterized by an increasing trend, as a result of positive price signals from international market. Since previous researches on economics of rapeseed production were aimed at non-family farms, focus in this paper is on the same aspects on family farms from lowland production region. Results are analyzed in view of micro and macro-economic trends. Increase of world demand for oil crops, as a result of increasing production of renewable fuels and food needs, causes a trend of higher prices, which will probably remain in the following period. Due to this, opportunities are made for Serbian farmers in low-land production region to increase agriculture area under rapeseed. [ABSTRACT FROM AUTHOR]

Our modern way of life causes enormous amounts of waste to be deposited at waste disposal sites, thus making it imperative to use the waste gas as fuel. The paper presents various modes of using waste gas as a source of energy, focusing on traditional and on more recent, innovative methods. Some technologies are analysed using techno-economical comparisons. [ABSTRACT FROM AUTHOR]