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There is new evidence from a number of sources that organic practices are able to deliver increased yields, improvements in soil and a boost to the income of Africa’s small farmers.

1987:  "..problems related to mining waste may be rated as second only to global warming...mining waste can result in profound, generally irreversible destruction of ecosystems"

~ expert assessment from Environmental Protection Agency, 1987

2003: "...the groundwater in the mining district of Johannesburg, South Africa, is heavily contaminated and acidified....The polluted groundwater is discharging into streams in the area and contributes up to 20 % of the stream flow, causing an increase the acidity of the stream water. The effect of the
contaminated water from the mines can persist for more than 10 km beyond the source" 

~ Naiker study, 2003 "Acid mine drainage from gold mining activities in Johannesburg, South Africa and environs"