C10: FINITE AND RENEWABLE RESOURCES
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What are finite resources?
-resources that will run out -there is a limited amount
What are renewable resources?
resources that can be replenished
What is sustainable development?
meeting the needs of current generations without compromising the needs of future generations
What are some examples of finite resources?
-coal -metal -nuclear fuels -crude oil -natural gas
What are some examples of renewable resources?
-wood -leather -cotton -ethanol
What are the 2 methods of extracting copper from low grade ores?
-Phytomining (Plants) -Bioleaching (Bacteria)
What is the process of phytomining?
-grow plants on low grade ore -plants absorb copper compounds -plants are burnt to produce ash containing copper compounds -electrolysis of copper compounds in ash
What is the process of bioleaching?
-bacteria are ‘fed’ low grade copper ores -bacteria create a ‘leachate’ solution containing copper compounds -electrolysis of solution
What are advs of phytomining and bioleaching compared to mining?
-less CO2 produced -less destruction of habitats -preservation of high grade ores