The problem of waste

Authors : Travail collectif(plus d'infos)
Summary :
This module highlights the problems posed by the waste produced by human activities and the possibilities for processing this waste.
Publication : 1 January 2002
Duration :
Two sequences (about ten sessions)
Material :

For a class of about 30 pupils:
- waste
- 30 pairs of protective gloves
- 30 protective masks  
- newspaper (to be brought from home)· - 8 plastic tanks
- a large 10 liter plastic tank (to be brought from home)·
- plastic film
- earth, sand, gravel, clay (to be brought from home)
- 16 coffee filters
- 8 plastic bottles (to be brought from home)
- food coloring
- activated wood carbon
- cotton wool
- 5 doubles cadres for paper recycling
- old rags (to be brought from home)
- a mixer (to be brought from home)
- a waterproof wooden plaque or a support (e.g. : a table)

Note :
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Collective work carried out by Nantes School of Mines and primary school teachers.


- Waste: materials or effluents (liquids or gas) that is disposed of because it is no longer needed.
- Biodegradable:  describes waste that can be decomposed by living organisms (generally by the action of bacteria, mold or worms found in the soil and the water). Example: The skins of legumes are biodegradable.
- Pollution: damage caused to the environment (air, water and soil) by the introduction of a substance associated with human activities causing an unfavorable modification of the natural environment.
- Toxicity: Property of causing health problems in living organisms that could lead to death.