Gold rush threat to tropical forests

Global gold production has increased from around 2,445 tonnes in 2000 to around 2,770 tonnes in 2013, while prices have soared.
This has made it profitable to mine in areas such as the soil beneath tropical forests.
The removal of vegetation and development of roads and railways can have long-term impacts, say the scientists.
Gold mining can also create pollutants such as mercury, which can enter rivers and the atmosphere.
http://www.bbc.com/news/science-environment-30804820