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来自MSN
8 小时
Jewelry recycling: How to recycle gold and silver and jewelry
Gold and diamond mining are notoriously disastrous for the environment. Global greenhouse gas emissions from gold mining alone produce more than 100 metric tons of CO2 emissions annually. 1 So while ...
Mining Technology
20 小时
Gold mining’s potential in West Africa
West Africa is a major gold mining hub, but political instability and illegal mining activities are proving barriers to its ...
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