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The Sun is the primary energy source for all life on Earth. Solar energy is clean and is available all over the world. The total energy produced, in 2016, was 7236 MWh, while the total consumed was 6660 MWh. The average photovoltaic energy generated was 255 MWh, which accounts for 3.5% of the total production and 8.2% of the RES (3096 MWh). Investments in renewable energy in Romania began in late 2008, when Green Certificates were granted by Law no. 220. In this paper, we review the photovoltaic system development in Romania, from 2011, when the market began to develop, to the present day. The climate change and air pollution have to be slowed down and reduced by implementing renewable and sustainable solutions in order to generate electricity. The photovoltaic industry has an important role in Romania's development, both economically and environmentally and by having the “unlimited resource” advantage, it is a good alternative to fossil fuels. Now, the largest solar park in Romania, with 332,000 operational PV units, located in Ucea de Sus, Brasov County and commissioned in 2013, has an installed capacity of 82 MW, and covers a land surface of 200 ha. 178 years ago, French physicist Edmond Becquerel discovered the photoelectric effect, in 1839. At the moment, the typical power of solar PV modules is less than 500 W, depending on efficiency and temperature sensitivity. Currently, long-term research on photovoltaic cells focus on increasing the power output, increasing the efficiency and reducing the temperature sensitivity. [ABSTRACT FROM AUTHOR]

Analyzing of the effects and the determinants of the energy paradigm changes on influencing the economic growth in European Union starts from the assumption that the economy is highly dependent of energy consumption in achieving of the economic growth and welfare for population. Consequently, the changes in the energy paradigm imply significant transformations in the production structures and their evolution. The aim of the paper is to present and evaluate the effects and determinants of the energy paradigm changes on assuring economic growth in European Union, by using the panel data approach and its subsequent techniques. In this respect, there was considered the evolution of nine economic variables across 30 countries, representing the EU member States during the examined period, plus Iceland and Norway, in order to revile direct and irrefutable connections among these variables in shaping the new energetic paradigm in European space. The results obtained during the research confirm that all nine variables are determinant and significant elements in shaping a new and proactive energy policy and it undoubtedly contribute in achieving of the sustainable economic development [ABSTRACT FROM AUTHOR]

Limited fossil resources, the continuous increment in fuel prices and severe environmental problems require new sustainable electricity generation options, which utilize renewable energies. Solar photovoltaic generation is a proven renewable energy technology and has the potential to become cost-effective in the future, for it produces electricity from the solar radiation. In Ghana, the electricity demand is rapidly increasing at a rate of 10% annually. In the attempt to change the conventional energy intensive economical development and its negative impact on the environment, the government has begun to support the development of the solar photovoltaic technology strongly. In this paper, the state of solar photovoltaic, the challenges facing the industry, the potential of the technology, the policies and strategies to promote development of the technology have been presented. [ABSTRACT FROM AUTHOR]

Abstract: Sustainable development and participatory governance are among the central policy priorities of our time. The challenge is at all scales of development and participation. Finding and validating methodological approaches has become urgent. Existing decision processes such as multi-criterion decision analysis (MCDA), multi-objective decision making (MODM), life cycle assessment (LCA) and cost-benefit analysis (CBA) are frequently used, with varying degrees of satisfaction reported. It appears that sustainable development can be assessed and analysed in different ways, any of which may be of use but none of which seems to be complete. The use of all, however, appears to involve such complexity as to be not feasible. There is a need for a more integrated and systematic approach to decision-making. In this paper, existing decision aid processes and frameworks are reviewed, and a novel evolutionary approach is proposed that can support them all. [Copyright &y& Elsevier]

Abstract: Energy plants play an important role in the development of bioenergy. In the world, there are many kinds of energy plants, but they are not utilized sufficiently. In the current paper, we discussed the situation of the research and development of traditional energy plants and some new energy plants in the world. At the same time, we focused on the distribution of some special energy plants and discussed their advantages in China. At last, we provided some suggestions for developing global energy plant field. [Copyright &y& Elsevier]

Abstract: Hydropower is a clean and renewable energy source. Considering the economic, technical and environmental benefits of hydropower, most countries give priority to its development. China has the richest hydro resources on the planet with a total theoretical hydropower potential of 694GW. Developing hydropower is of great importance to alleviate the energy crisis and environmental pollution resulting from the rapid economic growth of China in the 21st century. This paper provides a survey of hydropower development in China. Over the last five decades, China’s hydropower has developed quickly. The installed capacity of hydropower is 145.26GW presently. Some large hydropower plants have been in operation and many are still under construction, including the Three Gorges Project (TGP) and pumped-storage power stations. Small hydropower development accelerates rural electrification of this country. [Copyright &y& Elsevier]