As the first heat wave of summer plunges California into yet another wildfire season, some environmental groups are taking aim at a commercial fire retardant that most residents have grown all too familiar with during recent, devastating fire years.
Phos-Chek, that neon-pink goo that airplanes dump over wildfires, is a sticky slurry of ammonium phosphate designed to coat vegetation and other fuels to deprive advancing flames of oxygen. Fire authorities swear by the product, calling it indispensable.
But critics argue that officials are overlooking the product’s ecological risks. Studies have shown the retardant can harm plants, fish and other species, including steelhead trout and Chinook salmon. It can also act as a fertilizer that grows more vegetation, which can later act as fuel for fires.
