Today is La Hora del Planeta when people are asked to consider their impact on our planet and, a s symbol of their willingness to look after our world, put out their lights from 8.30pm local time for an hour.
La Familia Tellerín and WWF have produced a little video to promote this:
You could use this video to practice using Se debe and No se debe
e.g. Se debe apagar las luces. No se debe malgastar el agua. Se debe cerrar la puerta del frigorífico etc
And then Peppa Pig has added her voice, offering advice (and there’s a colouring sheet too!):
I also liked the video below from WWF that explains the initiative in a more detail for older learners.