Where is the most lithium mined?
With 51,000 tons, Australia was by far the most important supplier of lithium in 2018 – ahead of Chile (16,000 tons), China (8,000 tons) and Argentina (6,200 tons). This is shown by figures from the USGS (United States Geological Survey). The four countries mentioned have long dominated the picture, with Australia only gaining a clear lead over Chile in recent years.
How do the mining methods differ?
Put simply, lithium from Australia comes from ore mining, while in Chile and Argentina lithium comes from salt deserts, so-called salars. The extraction of raw materials from salars functions as follows: lithium-containing saltwater from underground lakes is brought to the surface and evaporates in large basins. The remaining saline solution is further processed in several stages until the lithium is suitable for use in batteries.
Why is lithium mining under criticism?
There are always critical reports on the extraction of lithium from salars: In some areas, locals complain about increasing droughts, which for example threatens livestock farming or leads to vegetation drying out. From the point of view of experts, it is still unclear to what extent the drought is actually related to lithium mining. It is undisputed that no drinking water is needed for the lithium production itself. What is disputed, on the other hand, is the extent to which the extraction of saltwater leads to an influx of fresh water and thus influences the groundwater at the edge of the salars. In order to assess this, the underground water flows in the Atacama Desert in Chile, for example, have not yet been sufficiently researched. In addition to lithium mining, possible influencing factors include copper mining, tourism, agriculture and climate change.