ENV100Y5 Lecture Notes - Lecture 35: Heavy Metals, Siltation, Conflict Resource
69
ENV100Y5 Full Course Notes
Verified Note
69 documents
Document Summary
Discharge of contaminants from drilling, trenching, road access. Mining and milling can have more significant impacts. Organic compounds in chemical reagents - cyanide, ammonia used to separate ores - waste rock piles and tailings. Discharge of airborne contaminants, including heavy metals; organics; sulphur; etc. Reclamation return the site to a condition similar to its pre-mining condition. Remove structures, replace overburden, fill in shafts, and replant vegetation. Governments in some countries require companies to reclaim (restore) surface- mined sites. In canada, companies are required to post bonds to cover reclamation costs before mine development is approved. Even on restored sites, impacts may be severe and long- lasting. Essential symbioses are eliminated and often not restored. Socioeconomic impacts of mine closure impacts on indigenous people. Natural resources whose exploitation and trade in a context of conflict contribute to, benefit from, or result in serious violations of human rights, or commission of crimes under international law.
