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COST 507 - Repositório Aberto da Universidade do Porto

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Raw Materials<br />

The Cycle of Materials<br />

Elements<br />

_J · Metals<br />

^ · Chemicals · Cement )<br />

• Paper<br />

Engineering Materials<br />

^^Dispoaall"^^ Scrap f^\ „<br />

Nrjrj­decomposing<br />

Waste<br />

Fig. 7: Cycle of materials<br />

A<br />

/ Λ<br />

65% y><br />

; " — > — Í ^<br />

J ! ' S,<br />

36% )<br />

¿ ' "~Λ<br />

27% 1<br />

4B% )<br />

Paper<br />

Alum inum<br />

Glass<br />

Iron a ndStc el<br />

10%<br />

Plas tics<br />

¿ ¿_ /<br />

10 20 30 40 SO 60 70 80 90 100<br />

Fig. 8: Recycling rates of several materials<br />

­ 46

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