||This bachelor thesis is aimed at quantification of cost reduction of integrated approach to climate change and air pollution in the Czech Republic. Firstly, the terms of air pollution and climate change are explained and the relevant EU legislation is described. The second chapter is dedicated to historical development in the both fields in the Czech Republic. The main assumption of the thesis is examined using the GAINS model. In the third chapter is provided introduction to the mathematical foundations of the model as well as description of scenarios of possible future development in both of the fields. Finally, the results of the analysis are presented, with special care dedicated to the most likely scenarios and impacts of emissions reduction on human health and ecosystems.