The severe working conditions, especially for children who labor underground. The mines extract gold, silver, tin and zinc.
These working conditions, especially for children, must be changed.
....about 250,000 to document the daily lives of miners. They're part of a centuries-old enterprise to extract silver, tin, zinc and gold from the mountains. He was struck by the harsh and sometimes dangerous conditions the miners work in — and by the number of children he saw working in the mines. Some were teenagers. One youngster said he was 11 years old...