Glycol-based de-icers are substances used to prevent ice formation on surfaces such as roads, runways, and vehicles. They work by lowering the freezing point of water, which helps to keep surfaces clear during winter weather. Commonly used in airports, these de-icers are effective at melting ice and snow, ensuring safer travel conditions. These de-icers typically contain compounds like ethylene glycol or propylene glycol, which are less harmful to the environment compared to traditional salt-based de-icers. While they are effective in managing ice, their use can still have some ecological impacts, particularly on water quality and plant life.