Environmental conservation is an essential part in education. Knowing about topics related to the environment lets people act consciously. It is important to classify solid wastes according to the following parameters:

Reject: those products that are not renewable or reusable.

Reduce: overconsumption, especially of products that generate residues difficult to recycle.

Re-use: those objects that are no longer in use, especially empty containers.

Repair: damaged and old elements and re-use them.

Recycle: those products that are no longer in use but can be used as raw material for new products.