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California has something very important, lithium.
We need it to make special batteries.
Many companies are in Salton Sea Lake, California.
They're trying to find a safe way to get lithium from the earth.
The US usually gets lithium from other countries.
But Jim Turner's company wants to dig 2,300 metres to get lithium.
Countries are becoming eco-friendly.
They want electric cars.
Electric cars need lithium batteries.
Very soon, the lithium business will double.
Salton Sea Lake was popular with celebrities and boat racing fans.
But the climate's changing.
And the lake is getting dry.
This puts dangerous dust in the air.
This makes many people ill.
Researchers are testing the lake.
They don't want the new lithium business to create more problems.
Charles Diamond is a researcher.
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