The aim of the article is to discuss and assess the diversification of renewable energy sources consumption in European Union member states. The time scope covers 2005 and 2015. The data comes from Eurostat. The analysis was based on synthetic indicators – using a non-standard method. Synthetic indicators were assessed based on three simple features such as: the share of renewable energy in energy consumption in 2015, the difference between the share of renewable energy in energy consumption in 2015 and in 2005 (in percentage points), deficit/surplus in the 2020 target reached in 2015 (in percentage points). The European Union member states were divided into four diversified group in terms of renewable energy sources consumption (first class – a very high level, second class – quite a high level, third class – quite a low level, fourth class – a very low level). Then the divided groups were analyzed according to the share of renewable energy sources in the primary production of renewable energy and the consumption of individual renewable energy sources. During the research period renewable energy consumption increased in the European Union, but individual member states are characterized by a diverse situation. The type of energy used depends largely on national resources. The countries of Northern Europe are characterized by a greater share of renewable energy sources in consumption. Biomass is the most popular renewable source of energy in the European Union. Depending on the conditions of individual countries – it is agricultural and forest biomass.

An unsustainable energy mix and energy overconsumption contribute to negative processes such as environmental pressure or energy dependency. The aim of the article is to assess the European Union countries situation in terms of sustainable energy consumption. Eurostat was were used in the analyses. The research was based on synthetic indicators for 2017 data. A non-standard method was used. In accordance with the assumptions of sustainable energy consumption, six indicators were proposed: primary energy consumption (2005=100), final energy consumption (2005=100), share of renewable energy in energy consumption, deficit/surplus in the 2020 renewable energy sources consumption target, energy import dependency (%), greenhouse gas emissions intensity of energy consumption (2000=100). The share of renewable energy in energy consumption and deficit/ surplus in the 2020 renewable energy sources consumption target are stimulants, other features are destimulants. The European Union countries were classified into four groups due to the situation in terms of sustainable energy consumption (first class – favorable situation, second class – quite favorable situation, third class – rather unfavorable situation, fourth class – unfavorable situation). According to the results in twelve countries the situation was identified as favorable or quite favorable, while in the other sixteen countries as rather unfavorable and unfavorable. However, all countries have entered the path of necessary changes. It is important to continue monitoring and analyzing the progress of European Union countries in the field of energy and climate policy.