Renewable energy sources management in the EU-27 countries

include, in particular, increasing the efficiency of energy conversion
from non-renewable energy sources, the wider use of renewable
energy sources and on the other hand, the rational use of energy by
consumers. This study deals with the application of renewable energy
sources (green energy), which, in addition to environmental benefits,
also increase the state's independence from the import of fossil fuels.
The world trend is clearly moving towards
more intensive use of these clean green energies. Therefore, their
higher use is included among the strategic goals of energy policy in
most countries of the world, in EU countries, including Slovakia. The
paper aims to examine the most important renewable energy sources
producing green energy in the EU-27 member states in the period of
2010-2020. The subject of the research is the indigenous production
of geothermal energy, solar thermal energy, primary solid biofuels,
biogases, and renewable municipal waste. The analyzed EU countries
differ in the most important renewable energy production. The
countries of northern Europe are the Union leaders in producing
energy from waste. Italy is a leader in the use of geothermal energy.
The countries of northern Europe, including the Baltic States, are
making progress in the production of solar energy. The cluster
analysis resulted in the identification of countries with similar
characteristics in the case of the development of domestic production
of selected renewable sources in the examined period. The analysis
showed the development of indicators had not changed significantly
over the last decade, although some countries have moved within the
established clusters.