Canadian mining company spied on opponents and activists in Brazil

As a consequence, the local geography has been profoundly transformed. As you approach the mining area we witness an immense crater that covers 615 hectares, half the size of Heathrow’s airport, and resembles a lunar landscape. The only signs of life are the imposing bulldozers and the high-wheeled vehicles that transport the rocks to the plant. There, toxic chemicals, including cyanide, are employed to separate out the gold powder, which is later molten in ingots and transported by helicopter to São Paulo for export around the globe.
http://www.theguardian.com/sustainable-business/2015/may/13/canadian-mining-company-spied-on-opponents-and-activists-in-brazil