In recent decades, climate change has emerged as a great threat to the entire planet. The governments of different countries, different organizations for the protection of the environment, research institutes and universities are involved in different ways in understanding and finding methods to counteract and minimize the effects of these changes that unfold on the environment but also on the economy and the population at a global level and also at the level of geographical areas or countries in different forms. Global warming is due to the greenhouse effect created by different types of gases that are found naturally in the atmosphere - but also generated by human activities, among which the most incriminated is carbon dioxide, because its supposed contribution to the increase in temperature it is significant. At the level of the European Union, we have a climate change law that establishes mandatory objectives for the reduction of greenhouse gas emissions, with as methods of achieving these objectives a varied range of concrete measures to reduce emissions, to save energy, to capture carbon dioxide, to switch to "green", non-polluting energies. The costs for reducing carbon dioxide emissions in the atmosphere at the level of the European Union, and other countries are huge, they create an additional burden on the budgets of these countries and the effects are currently uncertain. The paper aims to identify the existing correlation between the increase in the percentage of atmospheric carbon dioxide depending on the different sources that generate it and the increase in the average global temperature, and implicitly the extreme manifestations of the weather.