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Energy security of Baltic states Usually the concept of energy security is related to the uninterruptible supply, sufficient energy storage, advanced technological development of energy sector and environmental regulations. Other studies add other indicators to this list: diversification of energy suppliers, energy import dependence and vulnerability of political system.

Even now being a part of the European Union, Estonia, Latvia and Lithuania are still considered as the most vulnerable EU member states in the energy sphere. Due to their Soviet past, Baltic states have several gas pipelines on their territories coming from Russia. Moreover, several routes of oil delivery also have been sustained from Soviet times: These are ports in Ventspils, Butinge and Tallinn. Therefore, Estonia, Latvia and Lithuania play a significant role not only in consuming, but also in distribution of Russian energy fuels extracting transaction fees. So, the overall EU dependence on the Russia's energy supplies from the one hand and the need of Baltic states to import energy fuels from their closer hydrocarbon-rich neighbor creates a tension that could jeopardize the energy security of Estonia, Latvia and Lithuania.

As a part of the EU from 2004, Baltic states must comply with the EU's regulations in energy, environmental and security spheres. One of the most important documents that the EU applied to improve the energy security stance of the Baltic states are European Union climate and energy package, including the Climate and Energy Strategy 2020, that aims to reduce the greenhouse emissions to 20%, increase the energy production from renewables for 20% in overall share and 20% energy efficiency development.

Assessment
The calculations take into account not only economic, but also technological and energy-related factors: Energy and carbon intensity of transport and households, trade balance of total energy, energy import dependency, diversification of energy mix, etc. It was stated that from 2008, Baltic states experiences a positive change in their energy security score. They diversified their oil import suppliers due to shutdown of Druzhba gas pipeline in 2006 and increased the share of renewable sources in total energy production with the help of the EU policies.

Estonia usually was the best performing country in terms of energy security, but new assessment shows that even though Estonia has the highest share of renewables in the energy production, its energy economy has been still characterized by high rates of carbon intensity. Lithuania, in contrast, achieved the best results on carbon intensity of economy but its energy dependence level is still very high. Latvia performed the best according to all indicators. Especially, the high share of renewables were introduced to the energy production of Latvia, that can be explained by the state's geographical location and favorable natural conditions.

Possible threats to energy security
Firstly, there is a major risk of energy supply disruption. Even if there are several electricity interconnectors that connect the area with electricity-rich states (Estonia-Finland interconnector, Lithuania-Poland interconnector, Lithuania-Sweden interconnector), the pipeline supply of natural gas and tanker supply of oil are unreliable without modernization of energy infrastructure.

Secondly, the dependence on single supplier – Russia – is not healthy both for economics and politics. As it was in 2009 during the Russian-Ukrainian gas dispute, when states of Eastern Europe were deprived from access to the natural gas deliveries, the reoccurrence of the situation may again lead to economic, political and social crisis. Therefore, the diversification of suppliers is needed.

Finally, the low technological enhancement results in slow adaptation of new technologies, such as construction and use of renewable sources of energy. This also poses a threat to energy security of the Baltic states, because slows down the renewable energy consumption and lead to low rates of energy efficiency.