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Successful energy transitions, also referred to as leapfrog development, present enormous prospects for EU nations to become carbon neutral by shifting from fossil fuels to renewable energy sources. Along with climate change, EU countries must address energy security and dependency issues, exacerbated by factors such as the COVID-19 pandemic, rising energy costs, conflicts between Russia and Ukraine, and political instability. Diversifying energy sources, generating renewable energy, increasing energy efficiency, preventing energy waste, and educating the public about environmental issues are proposed as several strategies. The study draws the conclusion that central European countries may transition to a clean energy economy and become carbon neutral on economic and strategic levels by locating alternative clean energy supply sources, reducing energy use, and producing renewable energy. According to the study, the EU energy industry can be decarbonised and attain energy security using three basic strategies, such as supply diversification, energy savings, and quicker adoption of renewable energy to replace fossil fuels. The energy transformation industry still needs to improve energy efficiency, incorporate a circular and sustainable bioeconomy, and support renewable energies, including solar, wind, hydropower, nuclear, and hydrogen. [ABSTRACT FROM AUTHOR]

The energy crisis caused by the Russia–Ukraine war (RUW) has affected the energy supply chain. The countries most impacted by the sanctions imposed on Russia due to the invasion of Ukraine focused on replacing the countries they import their energy from in the short term and switching fuel, for example, from natural gas to coal in Germany. The objective of this article is to verify how the war has impacted energy trade and electricity generation in Germany and the United Kingdom (UK). The results indicate that the RUW had consequences on these countries' energy sector, significantly affecting fuel trade and electricity generation in the immediate aftermath of the war. • Russia's invasion of Ukraine sparked a global crisis in energy supply chains. • The Russia–Ukraine war led countries, such as Germany, to reactivate coal plants. • The UK replaced Russian fuel imports with those from other countries, like the USA. [ABSTRACT FROM AUTHOR]