The clean-energy revolution has burgeoned lithium production in Australia, with 2015 seeing the world's top producer delivering 13,400 metric tonnes. Australia has the fourth-largest reserves of lithium at 1.5 million tonnes (mt), following Argentina, China and Chile. Talison Lithium's Greenbushes mine in WA's South West has been operational for the last 25 years and hosts the world's largest known lithium reserves.