Difference between revisions of "Mining and Metals"
m |
m |
||
Line 38: | Line 38: | ||
Aluminium is more energy intensive and polluting than any other metal to produce. The industry goes to great lengths to portray this shiny and versatile metal as part of the solution to climate change due to its recyclability and lightweight nature. But the real story of aluminium is one of destruction, displacement and waste: | Aluminium is more energy intensive and polluting than any other metal to produce. The industry goes to great lengths to portray this shiny and versatile metal as part of the solution to climate change due to its recyclability and lightweight nature. But the real story of aluminium is one of destruction, displacement and waste: | ||
− | • Bauxite (aluminium's ore) is shallow strip mined from semi tropical forests, often displacing indigenous peoples and destroying their livelihoods, as well as creating large scale soil erosion and water pollution. | + | • Bauxite (aluminium's ore) is shallow strip mined from semi tropical forests, often displacing indigenous peoples and destroying their livelihoods, as well as creating large scale soil erosion and water pollution. |
− | + | • Bauxite is refined to produce alumina, leaving tonnes of 'red mud' - the caustic and toxic sludge that flooded several Hungarian towns in 2010. | |
− | • Alumina is then smelted to remove the strongly bonded oxygen and produce aluminium. This process is often carried out thousands of miles from where it was mined and requires huge amounts of energy, producing highly polluting fluorides, sulphur dioxide, perfluorocarbons (very strong greenhouse gases), cyanide and a classified hazardous waste called [[Spent Pot Lining]]. | + | |
− | • Producing one tonne of aluminium uses 1378 tonnes of water and produces 13.1 tons of greenhouse gases (CO2e), making it responsible for 1 per cent of global carbon emissions | + | • Alumina is then smelted to remove the strongly bonded oxygen and produce aluminium. This process is often carried out thousands of miles from where it was mined and requires huge amounts of energy, producing highly polluting fluorides, sulphur dioxide, perfluorocarbons (very strong greenhouse gases), cyanide and a classified hazardous waste called [[Spent Pot Lining]]. |
− | • Around 30 per cent of aluminium is used by the arms or 'defence' industry, making it an important 'strategic metal' for most governments. <ref>Felix Padel and Samarendra Das, 2010. 'Out of This Earth: East India Adivasis and the Aluminium Cartel', Orient Blackswan, Delhi</ref> | + | |
+ | • Producing one tonne of aluminium uses 1378 tonnes of water and produces 13.1 tons of greenhouse gases (CO2e), making it responsible for 1 per cent of global carbon emissions - and growing. Though recycling aluminium uses 95 per cent less energy than making it new, it still uses the same amount as producing new steel. | ||
+ | • Around 30 per cent of aluminium is used by the arms or 'defence' industry, making it an important 'strategic metal' for most governments. <ref>Felix Padel and Samarendra Das, 2010. 'Out of This Earth: East India Adivasis and the Aluminium Cartel', Orient Blackswan, Delhi</ref> | ||
Line 73: | Line 75: | ||
|style="color:#000;"| | |style="color:#000;"| | ||
{{Template:badge}} | {{Template:badge}} | ||
− | + | Related Powerbase categories: | |
*[http://www.powerbase.info/index.php?title=Category:xxx] | *[http://www.powerbase.info/index.php?title=Category:xxx] |
Revision as of 13:34, 13 July 2011
Welcome to the Mining and Metals portal on Powerbase | ||
---|---|---|
|
|
|
|
References
|