Sharpen your awareness of energy sources: What’s the energy source for heating your room? Inform yourself (ask your family, technical caretaker, etc.) and take a picture of: for example the heating (Heizung), boiler (Heizkessel), heating and oil storage room (Heizungsraum und Heizöltank), thermal heat pump (Wärmepumpe), etc.
Give a short comment about your energy source and heating system. You might even give it a try at explaining how it works!