With associations like WWF or movements like Earth Hour, people can’t be aware that each simple gesture counts to preserve the environment. The waste of energy contributes to global warming. Millions of people keep electronic devices or lights on when they leave a room, They consume energy. Every time you turn off the light, that means you do something good for planet Earth. Greenpeace has decided to thank all people who act. They have produced stickers with a text that glows in the dark to thank people who switch the light off. These stickers have been placed in public areas and hotels, close to the light buttons