"We have to save as much energy as we can." I keep on reminding the students: Switch on enough lights & fans for the class. For example, when we using the front of the classroom, we should switch on 3 fans & 3 rows of lights for half of the class. We need not switch on all the lights & fans. In this case, we save the energy, the earth & money as well. Of course, we must have enough lights & ventilation for lessons (work).
Switch off all the lights & fans when there is nobody in the classroom. In this case, the school will have more money for others facilities. We should apply this to our home.
Every body play our part well, we can live happily & healthily!!