and ammonium polyphosphate ((NH4PO3)n). Along with its use as a fertilizer (providing nitrogen and phosphorous to plants), you often see ammonium phosphate in crystal-making kits that are popular ...

Environmental experts have said that spraying fire retardant using planes is ineffective, expensive and a growing source of pollution for rivers and streams ...

It is made using a mix of chemicals that are used to extinguish or slow down the spread of the blaze, including ammonium polyphosphate - which does not evaporate easily and stays set on materials ...