Lithium Mining: Environmental Impact and How It's Getting Better

Two ways to get lithium

Brine extraction pumps salty groundwater from beneath desert salt flats (the Salar de Atacama in Chile is the most famous) into vast evaporation ponds, where sun and wind concentrate the lithium over 12–18 months. Hard-rock mining digs spodumene ore, mainly in Australia, and crushes and roasts it to extract lithium. Brine is cheaper and lower in energy but slow and water-intensive; hard rock is faster but needs more energy and produces more CO₂ per tonne.

The main environmental concerns

• Water — brine operations sit in some of the driest places on Earth, and pumping groundwater can affect wetlands, wildlife and the water available to farming and indigenous communities.
• Land — evaporation ponds and open-pit mines occupy large areas and fragment habitat.
• Energy and emissions — roasting spodumene and refining lithium chemicals is energy-intensive, especially where the electricity comes from coal.
• Waste — tailings and spent brine must be contained to protect soils and rivers.

Keeping it in proportion

A typical EV battery contains roughly 8–10 kg of lithium, mined once and recyclable. The same car running on petrol would burn tens of thousands of litres of fuel over its life, each litre requiring oil to be extracted, shipped and refined. Lithium demand is rising fast, which is exactly why the industry's practices are under pressure to improve.

What is improving

Lithium is not scarce — known resources are large — but producing it responsibly is the challenge. Regulation, recycling and new extraction methods are the levers that matter.