In what world? NGOs, academics, journalists, and non-profits have been speaking out about these and the blood diamond industries around them for decades at least
> Gold mining is one of the most destructive industries in the world. It can displace communities, contaminate drinking water, hurt workers, and destroy pristine environments
https://earthworks.org/issues/environmental-impacts-of-gold-...
> Most silver production results in large emissions of mercury to air, soil, and water. Where silver is extracted by small-scale miners, large quantities of mercury are used, resulting in large health and environmental damages.
http://www.env-health.org/IMG/pdf/silver_fact_sheet.pdf
> The mining, metal extraction and beneficiation phases are accompanied by air and water pollution, the generation of solid waste deposited on tailings dams and waste rock stockpiles, the abstraction of vast quantities of water and the use of huge quantities of energy
https://www.researchgate.net/publication/223232620_The_envir...
> Mineral resource exploitation also causes irreversible damage to the natural environment including deforestation, soil disturbance, air emissions, surface water pollution, groundwater contamination, dust, noise, workplace health and safety, and others.
http://www.imperial-consultants.co.uk/wp-content/uploads/202...