The aim of this Learning Scenario is to make students aware of how the knowledge they acquired in STEM subjects like Mathematics, Physics and Chemistry is applied in everyday life. For this reason, in order to provide a concrete example, we examine the cost of energy consumption in students¿ households, the impact of various energy sources on the environment and the processes through which a source of energy can be converted to another one. With this Learning Scenario, we expect that students will understand and become familiar with the phenomenon of pollution caused by energy production, and they will learn how to plan actions aimed at environmental protection.