The project involves the decommissioning of 84 carbon-intensive heat sources by connecting 38 properties constituting a resource of the municipality of Kluczbork to the gas network, in accordance with the hierarchy resulting from achievable ecological effects. The main objective of the project is to improve air quality in the municipality of Kluczbork. This is a particularly important task in the context of many years of problems in meeting air quality standards in the municipality and the potential health risk of residents exposed to substances emitted by carbon-intensive boilers and furnaces, especially those fired with solid fuels, with an outdated design, while allowing the combustion of other unacceptable substances, such as household waste. The planned actions aim to achieve levels of concentrations of substances in the air as defined in national legislation and European Union legislation. This applies mainly to fine particulate matter with a diameter of less than 10 μm, and indirectly also for benzo(a)pyrene, for which there are exceedances of the limit value or target value. Exposure to elevated concentrations of the indicated substances has a significant impact on the state of health, as well as the life expectancy of residents. A parallel objective of the activities covered by the project is to reduce greenhouse gas emissions, to counter the escalation of global warming and adaptation to climate change.