A new toxic metal has been found in the air after L.A. fires. No one knows where it’s coming from

Krista Copelan’s home didn’t burn in the Eaton Fire. But for months afterward, it was filled with poisonous traces of things that did.

Arsenic from treated wood and pesticides in the soil. Copper, likely from the wiring systems of the thousands of homes reduced to ash. Lead, discovered on the floor of her daughter’s bedroom, from old paint and leaded gasoline that leached into the ground only to be vaporized by flames.

And on Copelan’s kitchen floor: beryllium…

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