The document discusses the materials used in Tetra Brik cartons. It examines the layers found in the carton from the outside to the inside: paper, cardboard, plastic, aluminum, and more plastic. Each material serves an important purpose - plastic makes the carton watertight, cardboard keeps it from losing its shape, paper allows for printing, and aluminum protects the drink from oxygen in the air. The document explores why each material is used and provides the conclusion that this combination of materials makes up a Tetra Brik carton.

1. Materials and waste Part two

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