What Scent Keeps Horseflies Away? Horseflies are painful pests that feed on the blood of all mammals, including humans. The flies trace and find their prey by targeting the prey's appearance, movement and smell. Most fly control methods target the horsefly's olfactory senses.
CFCs. Chlorofluorocarbon (CFC) is an organic compound that contains carbon, chlorine, and fluorine, produced as a volatile derivative of methane and ethane. A common subclass is the hydrochlorofluorocarbons (HCFCs), which contain hydrogen, as well.
A: CFCs, also known as chlorofluorocarbons, are compounds that are most commonly used as refrigerants, propellants and solvents. Best known as Freon, CFCs have been discontinued as the main source of coolant in air conditioners and refrigerators because of their ability to deplete the ozone layer in the atmosphere.