Inside the world's largest lithium producer

Albemarle, the world's top producer of lithium and the operator of mines in Australia, Chile and the U.S., says it plans to bring its Kings Mountain, North Carolina mine online by 2027. The company, along with its main competitors SQM and Pilbara, control about 40% of the world's lithium supply, according to KeyBanc Capital Markets. Lithium is a critical mineral in electric vehicle batteries. CNBC got an inside look at Albemarle's operations in the U.S. and Chile.