森林火灾是世界上最美丽地区的恶神。但传统的灭火能力是有限的,因为灭火人员必须靠近火区并寻找到水源才能进行扑救。飞机撒水灭火很昂贵,效果也不理想。美国俄亥俄州Dyaton大学研制了一种物美价廉的灭火剂,它是一种含有磷酸二氢氨、糖和尿素的泡沫, Forest fires are evil gods in the most beautiful areas of the world. However, the traditional ability to extinguish fires is limited because firefighters must be close to the fire area and find water before they can save. The water-spraying of aircraft is expensive and the result is not satisfactory. An inexpensive fire extinguishing agent was developed at Dyaton University in Ohio, which is a foam containing ammonia dihydrogen phosphate, sugar and urea.