What are the lasting affects of iron ore on Canada?

Question

I am doing a geography question. i need answers.

Answer 1

Take the mining industry, for example, and a problem known as acid mine drainage (AMD). When companies mine metals such as copper, gold, lead, uranium, and zinc, they often seek metal deposits near the earth’s crust and dig what are known as open pit mines. Metal ores that have been sheltered from the earth’s weather for

millions of years may suddenly be exposed to air and rain water. This new mixture of air, water, and heavy metal compounds makes for a series of new and environmentally harmful chemical reactions collectively known as AMD.

mining activity is threatening to wipe out mineral reserves, and damage fragile eco-systems. it will produce toxic waste and polluted waters