Objectif :

Accroître la prise de conscience de la durée pendant laquelle différents matériaux restent dans la nature et la responsabilité que nous avons tous de ne pas salir.

Préparatifs :

Rassemblez une collection mixte de déchets et de salissures pour l'exercice : du verre au plastique, en passant par les emballages, le métal, les journaux et les pelures de fruits, etc.

Voici comment faire

1. Lay out a rope as a timeline, or draw a chalk line. Mark out several points of time along the line, showing years or centuries.
2. Work together, ideally in pairs or groups, and place the litter along the timeline according to how long they believe it takes for each item to decompose so that it is no longer visible.
3. Go along the timeline and discuss it. Have they got it right? Work through various points: for instance, how is it that certain items disappear quicker than others. Also talk about, for example, the fact that plastic can cause harm even when it is no longer visible. Mention that the time it takes for litter to break down is not always that important. The litter is still there long enough to cause harm to the environment and animals.
4. Discuss what we can do to save the Earth’s resources and reduce the quantity of litter by reusing more, recycling and making smarter choices when we shop, etc.