Thousands of gallons of the powder- Phos-Chek- has been used to contain Los Angeles wildfires. The substance is a fire retardant and has been widely used across the US since the 1960s.
Thousands of gallons of the powder- Phos-Chek- has been used to contain Los Angeles wildfires. The substance is a fire retardant and has been widely used across the US since the 1960s.