Understanding airplane de-icing and anti-icing processes

This segment explains why ice accumulation on an airplane's wings is dangerous, interfering with its aerodynamics. It then details the two-step process of de-icing and anti-icing: first, using a heated fluid of pressurized water and propylene glycol to melt existing ice, and then applying an anti-icing fluid to prevent new ice formation by lowering the freezing point on the plane's surface, with some solutions capable of lowering it below -50 degrees Fahrenheit.