Background: The war in Ukraine, the major event of recent years in relation to public international law, is being challenged by the actions of the Russian side by interfering in the territory of a sovereign state with the intention to annex specific parts of the state of Ukraine. The special importance of this war is the international community’s involvement, striving to uphold principles of international justice, preventing these situations from happening in Europe. Beyond the tragic loss of people's lives, a critical point is the degradation of the environment in these areas along with the possibility of destroying the states’ efforts to fight climate change. This war has far-reaching consequences beyond the battlefield. It impacts numerous social aspects and has a direct impact on the social well-being of society. Besides this, the increase of inflation rates globally, an energy crisis, disruptions within the transport market of goods and services, as well as other interconnected aspects of social life in general, are being directly impacted. This research encompasses an analysis across different categories, starting with GHG emissions, the effects of bombing campaigns in the vicinity of nuclear reactors, and assessing the potential risks of meltdowns and their subsequent repercussions. We have also analysed the socio-economic aspect, global market movement, energy crisis, and inflation. A critical discussion revolves around shifting the focus from fighting climate change towards addressing the current situation created by the war in Ukraine. Moreover, part of the research encompasses gauging public sentiment on specific questions and comparing the results from two different groups to discern potential divergencies in viewpoints. Methods: Methodology used: collection of materials from books, articles, official data, and other scientific reports; analysing and structuring the collected material; surveys. Results and Conclusions: Based on the research and analysis made throughout the study, we concluded that the war in Ukraine has been a step back in the fight against climate change.