The sourcesof energyrun the whole economy, and with a quality energy policies, on them depends the economy of a country. Many countries associate themselves with energy organizations, such as OPEC, to secure the market, set the price, prevent saturation of the market, and reduce energy insecurity. Countries that do not have their mining assets mostly import oil, natural liquefied gas and coal. The most developed countries of the world are at the same time the biggest consumers of these energy sources, and therefore the largest environmental polluters. The US is the largest oil consumer, and is always militarily and politically present in the Middle East. The European Union is dependent on Russian gas and the goal of European energy policy is to reduce dependence on Russian gas by creating new supply routes for LNG vessels from the United States, which is why the EU is pushing for the construction of LNG-based liquefied gas in Europe and in the Republic of Croatia in Omišalj on Krk. The German-Russian energy project North Stream 2 further increases the dependence of Europe on Russian gas and is rejected by the European Commission. A big problem for Europe is also Ukraine through which important gas pipelines pass, which Russia can close due to bad relations with Ukraine. Europe has 25% of the world's coal stock, but 21% of it is waste to Germany and 50% to Russia. The Republic of Croatia has no major oil reserves, so its oil needs meet the import, while it exploits natural gas sites in the northern Adriatic and exports most of its gas to Italy. The EU encourages more and more exploitation of renewable energy sources not only because of lack of energy sources but also for environmental protection. Traffic consumes about 30% of energy and this percentage increases, so measures are taken to reduce energy consumption in traffic.