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  • Aluminium is lightweight, durable, and 100 per cent recyclable.

  • In fact, 75 per cent of all the aluminium ever produced is still in use.

  • It's a key input for companies such as tech giant Apple and electric car makers, and an

  • essential material in industries such as construction and power transmission.

  • For that reason, demand is expected to grow by more than 50 per cent by 2050.

  • But aluminium production requires a lot of energy.

  • Aluminium comes from an ore called Bauxite, and smelting it is an electricity-hungry process.

  • Today the aluminium sector contributes about one per cent of global greenhouse gas emissions.

  • But as concerns mount over climate change, the pressure to produce greener aluminium,

  • with renewable energy sources, may gradually be rising.

  • Some major producers such as Russian giant Rusal, and Norway's Norsk Hydro can already

  • produce low-carbon aluminium.

  • Over 90 per cent of Rusal's aluminium is now made using hydroelectric power, while

  • two-thirds of Norsk Hydro's is produced using renewable energy sources.

  • But China produces more than 60 per cent of the world's aluminium, mostly from coal-fired

  • power.

  • The production of one tonne of aluminium in Europe, which largely uses renewable energy,

  • creates about four tonnes of carbon dioxide, compared with 15 tonnes in China.

  • Now though, for the first time in its 143-year history, the London Metal Exchange, the world's

  • main trading centre for industrial metals, is planning to launch a platform for low-carbon

  • aluminium.

  • The idea is to encourage more sustainable production.

  • But critics say a single carbon calculation is overly simplistic, focused too much on

  • primary smelting.

  • They say it runs the risk of overlooking the impact of other parts in a complex supply

  • chain, such as the mining of bauxite.

  • Also, low-carbon producers with existing sales contracts may not want the market setting

  • prices for them.

  • Consensus on the plan has yet to be reached, and for now, disclosure of CO2 emissions to

  • the exchange remains voluntary, but the appetite for greener aluminium could be here to stay.

Aluminium is lightweight, durable, and 100 per cent recyclable.

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鋁材料(A new pathway to greener aluminium? | Rethink Sustainability)

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    joey joey 發佈於 2021 年 09 月 21 日
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