The Bayan’obo deposit in Mongolia provides (since 2005) 45% of the world’s rare minerals. (photo credit).
On average, 130 grams of minerals and rare metals go directly into a smartphone. However, the overall damage and impact is far broader - an average of 44 kg of rock has to be extracted and destroyed to obtain these materials. In the end, the manufacture of a computer actually requires an average of almost 200 kg of raw materials.
The exploitation of these mines from which the materials are extracted also has a particularly disastrous impact on water resources. Gold production, for example, releases cyanide and mercury, which end up in rivers. Plus, in order to produce one tonne of neodymium (the rare material that makes our phones vibrate), 75,000 litres of water are contaminated with toxic substances.
The consequences of the production of these objects on freshwater reserves don't stop there either unfortunately. It takes on average 1,000 litres of fresh water to produce a smartphone and 1,500 litres to produce a computer. These are not negligible quantities in the context of increasing water stress in many parts of the world.