 The European Union, EU, has set ambitious targets for reducing greenhouse gas emissions by 2030. In order to meet these targets, the EU has been encouraging its member states to increase their use of renewable energy sources such as solar, wind and hydropower. The Vice-Grad 4, D4, Countries Czech Republic, Hungary, Poland and Slovakia are all post-communist nations that have experienced significant economic growth since the fall of the Iron Curtain. However, they still face many challenges when it comes to sustainability and renewable energy. This paper evaluates the progress made by the V4 countries towards meeting the EU's 2030 targets and assesses the potential impact of the EU's climate policy on the region. The analysis includes data from the World Bank, Eurostat and other sources, as well as interviews with experts in the field. The results indicate that the V4 countries will likely not meet the EU's 2030 targets without further investment in renewable energy infrastructure and policy reforms. This article was authored by Jacek Brezina, Wadim Strilkowski and Aleš Spivek.