Rolled zinc requires little energy
Furthermore, the energy required to transform metallic zinc metal into rolled zinc for building applications (2 MJ/kg) is low compared to that needed to transform other metals.
In the near future, progress in zinc recycling research and development will make it possible to replace increasing quantities of zinc ore with recycled zinc. This will contribute to a further reduction of total energy consumption.
1) European Study on the Eco-profile of primary Zinc Production by Dr.I.Boustead and Dr.W.T.Dove for the International Zinc Association, 1998
2) UM data
3) Metals for roofing and wall cladding. Recommendations 2000/1 from KBOB, Switzerland