to prove where a heavy metal came from," McCurry said. "We're working on that." Perimeter, the manufacturer of the Forest Service's fire retardant, said McCurry's research was on a formulation ...

to prove where a heavy metal came from,” McCurry said. “We’re working on that.” Perimeter, the manufacturer of the Forest Service’s fire retardant, said McCurry’s research was on a ...

The eye-popping substance coating streets, cars and surfaces is actually fire retardant, dropped by aerial firefighting tankers in massive plumes of red or pink. Unlike water drops, which target ...